diff --git a/packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/utils/from-cached-field-metadata-entity-to-flat-field-metadata.util.ts b/packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/utils/from-cached-field-metadata-entity-to-flat-field-metadata.util.ts
index 5802c2e261..18fe18810b 100644
--- a/packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/utils/from-cached-field-metadata-entity-to-flat-field-metadata.util.ts
+++ b/packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/utils/from-cached-field-metadata-entity-to-flat-field-metadata.util.ts
@@ -83,6 +83,10 @@ export const fromCachedFieldMetadataEntityToFlatFieldMetadata = <
       !isCachedFieldMetadataEntityOfType(
         relationTargetCachedFieldMetadata,
         FieldMetadataType.RELATION,
+      ) &&
+      !isCachedFieldMetadataEntityOfType(
+        relationTargetCachedFieldMetadata,
+        FieldMetadataType.MORPH_RELATION,
       )
     ) {
       throw new WorkspaceMetadataCacheException(
diff --git a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/dev-seeder.module.ts b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/dev-seeder.module.ts
index 64ff1f712a..1b2d335d9b 100644
--- a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/dev-seeder.module.ts
+++ b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/dev-seeder.module.ts
@@ -12,6 +12,7 @@ import { ObjectMetadataModule } from 'src/engine/metadata-modules/object-metadat
 import { ObjectPermissionModule } from 'src/engine/metadata-modules/object-permission/object-permission.module';
 import { RoleModule } from 'src/engine/metadata-modules/role/role.module';
 import { UserRoleModule } from 'src/engine/metadata-modules/user-role/user-role.module';
+import { WorkspaceMetadataCacheModule } from 'src/engine/metadata-modules/workspace-metadata-cache/workspace-metadata-cache.module';
 import { WorkspacePermissionsCacheModule } from 'src/engine/metadata-modules/workspace-permissions-cache/workspace-permissions-cache.module';
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/workspace-datasource.module';
@@ -38,6 +39,7 @@ import { WorkspaceSyncMetadataModule } from 'src/engine/workspace-manager/worksp
     TypeOrmModule.forFeature([Workspace, ObjectMetadataEntity]),
     ObjectPermissionModule,
     WorkspacePermissionsCacheModule,
+    WorkspaceMetadataCacheModule,
   ],
   exports: [DevSeederService],
   providers: [
diff --git a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/pet-custom-relation-field-seeds.constant.ts b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/pet-custom-relation-field-seeds.constant.ts
new file mode 100644
index 0000000000..abe444c2c7
--- /dev/null
+++ b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/pet-custom-relation-field-seeds.constant.ts
@@ -0,0 +1,23 @@
+import { FieldMetadataType, RelationType } from 'twenty-shared/types';
+
+import { type FieldMetadataSeed } from 'src/engine/workspace-manager/dev-seeder/metadata/types/field-metadata-seed.type';
+
+export const PET_CUSTOM_RELATION_FIELD_SEEDS: (FieldMetadataSeed & {
+  targetObjectMetadataNames: string[];
+})[] = [
+  {
+    type: FieldMetadataType.MORPH_RELATION,
+    label: 'Owner of the Pet (rocket or survey)',
+    name: 'owner',
+    icon: 'IconRelationManyToOne',
+    morphRelationsCreationPayload: [
+      {
+        type: RelationType.MANY_TO_ONE,
+        targetObjectMetadataId: 'to-be-resolved-later',
+        targetFieldLabel: 'Owned by',
+        targetFieldIcon: 'IconRelationOneToMany',
+      },
+    ],
+    targetObjectMetadataNames: ['surveyResult', 'rocket'],
+  },
+];
diff --git a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/services/dev-seeder-metadata.service.ts b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/services/dev-seeder-metadata.service.ts
index fd30b4dfa0..2ff39f2911 100644
--- a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/services/dev-seeder-metadata.service.ts
+++ b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/metadata/services/dev-seeder-metadata.service.ts
@@ -1,11 +1,15 @@
 import { Injectable } from '@nestjs/common';
 import { InjectDataSource } from '@nestjs/typeorm';
 
+import { isDefined } from 'twenty-shared/utils';
 import { DataSource } from 'typeorm';
 
 import { type DataSourceEntity } from 'src/engine/metadata-modules/data-source/data-source.entity';
+import { CreateFieldInput } from 'src/engine/metadata-modules/field-metadata/dtos/create-field.input';
 import { FieldMetadataService } from 'src/engine/metadata-modules/field-metadata/services/field-metadata.service';
 import { ObjectMetadataService } from 'src/engine/metadata-modules/object-metadata/object-metadata.service';
+import { ObjectMetadataMaps } from 'src/engine/metadata-modules/types/object-metadata-maps';
+import { WorkspaceMetadataCacheService } from 'src/engine/metadata-modules/workspace-metadata-cache/services/workspace-metadata-cache.service';
 import {
   SEED_APPLE_WORKSPACE_ID,
   SEED_YCOMBINATOR_WORKSPACE_ID,
@@ -13,6 +17,7 @@ import {
 import { COMPANY_CUSTOM_FIELD_SEEDS } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/company-custom-field-seeds.constant';
 import { PERSON_CUSTOM_FIELD_SEEDS } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/person-custom-field-seeds.constant';
 import { PET_CUSTOM_FIELD_SEEDS } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/pet-custom-field-seeds.constant';
+import { PET_CUSTOM_RELATION_FIELD_SEEDS } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/pet-custom-relation-field-seeds.constant';
 import { SURVEY_RESULT_CUSTOM_FIELD_SEEDS } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-fields/constants/survey-results-field-seeds.constant';
 import { PET_CUSTOM_OBJECT_SEED } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-objects/constants/pet-custom-object-seed.constant';
 import { ROCKET_CUSTOM_OBJECT_SEED } from 'src/engine/workspace-manager/dev-seeder/metadata/custom-objects/constants/rocket-custom-object-seed.constant';
@@ -26,6 +31,7 @@ export class DevSeederMetadataService {
   constructor(
     private readonly objectMetadataService: ObjectMetadataService,
     private readonly fieldMetadataService: FieldMetadataService,
+    private readonly workspaceMetadataCacheService: WorkspaceMetadataCacheService,
     @InjectDataSource()
     private readonly coreDataSource: DataSource,
   ) {}
@@ -35,6 +41,10 @@ export class DevSeederMetadataService {
     {
       objects: { seed: ObjectMetadataSeed; fields?: FieldMetadataSeed[] }[];
       fields: { objectName: string; seeds: FieldMetadataSeed[] }[];
+      relations?: {
+        objectName: string;
+        seeds: (FieldMetadataSeed & { targetObjectMetadataNames: string[] })[];
+      }[];
     }
   > = {
     [SEED_APPLE_WORKSPACE_ID]: {
@@ -50,6 +60,9 @@ export class DevSeederMetadataService {
         { objectName: 'company', seeds: COMPANY_CUSTOM_FIELD_SEEDS },
         { objectName: 'person', seeds: PERSON_CUSTOM_FIELD_SEEDS },
       ],
+      relations: [
+        { objectName: 'pet', seeds: PET_CUSTOM_RELATION_FIELD_SEEDS },
+      ],
     },
     [SEED_YCOMBINATOR_WORKSPACE_ID]: {
       objects: [
@@ -169,4 +182,108 @@ export class DevSeederMetadataService {
       schemaName: dataSourceMetadata.schema,
     });
   }
+
+  public async seedRelations({ workspaceId }: { workspaceId: string }) {
+    const config = this.workspaceConfigs[workspaceId];
+
+    if (!config) {
+      throw new Error(
+        `Workspace configuration not found for workspaceId: ${workspaceId}`,
+      );
+    }
+
+    if (!config.relations) {
+      return;
+    }
+
+    for (const relation of config.relations) {
+      await this.seedCustomRelation({
+        workspaceId,
+        relation,
+      });
+    }
+  }
+
+  private async seedCustomRelation({
+    workspaceId,
+    relation,
+  }: {
+    workspaceId: string;
+    relation: {
+      objectName: string;
+      seeds: (FieldMetadataSeed & { targetObjectMetadataNames: string[] })[];
+    };
+  }): Promise<void> {
+    const { objectMetadataMaps } =
+      await this.workspaceMetadataCacheService.getExistingOrRecomputeMetadataMaps(
+        {
+          workspaceId,
+        },
+      );
+
+    const relationFieldInputs = this.createFieldInputs({
+      relation,
+      objectMetadataMaps,
+      workspaceId,
+    });
+
+    await this.fieldMetadataService.createMany(relationFieldInputs);
+  }
+
+  private createFieldInputs({
+    relation,
+    objectMetadataMaps,
+    workspaceId,
+  }: {
+    relation: {
+      objectName: string;
+      seeds: (FieldMetadataSeed & { targetObjectMetadataNames: string[] })[];
+    };
+    objectMetadataMaps: ObjectMetadataMaps;
+    workspaceId: string;
+  }): CreateFieldInput[] {
+    const objectMetadataId =
+      objectMetadataMaps.idByNameSingular[relation.objectName];
+
+    if (!isDefined(objectMetadataId)) {
+      throw new Error(
+        `Object metadata id not found for: ${relation.objectName}`,
+      );
+    }
+
+    const relationFieldInputs = relation.seeds.map((seed) => ({
+      type: seed.type,
+      label: seed.label,
+      name: seed.name,
+      objectMetadataId,
+      workspaceId,
+      morphRelationsCreationPayload: seed.targetObjectMetadataNames.map(
+        (targetObjectMetadataName) => {
+          const targetObjectMetadataId =
+            objectMetadataMaps.idByNameSingular[targetObjectMetadataName];
+
+          if (!isDefined(targetObjectMetadataId)) {
+            throw new Error(
+              `Target object metadata id not found for: ${targetObjectMetadataName}`,
+            );
+          }
+
+          if (!isDefined(seed.morphRelationsCreationPayload)) {
+            throw new Error('Morph relations creation payload is not defined');
+          }
+
+          return {
+            type: seed.morphRelationsCreationPayload[0].type,
+            targetFieldLabel:
+              seed.morphRelationsCreationPayload[0].targetFieldLabel,
+            targetFieldIcon:
+              seed.morphRelationsCreationPayload[0].targetFieldIcon,
+            targetObjectMetadataId,
+          };
+        },
+      ),
+    }));
+
+    return relationFieldInputs;
+  }
 }
diff --git a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/services/dev-seeder.service.ts b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/services/dev-seeder.service.ts
index 4f44e9aecd..b29a142070 100644
--- a/packages/twenty-server/src/engine/workspace-manager/dev-seeder/services/dev-seeder.service.ts
+++ b/packages/twenty-server/src/engine/workspace-manager/dev-seeder/services/dev-seeder.service.ts
@@ -66,6 +66,10 @@ export class DevSeederService {
       workspaceId,
     });
 
+    await this.devSeederMetadataService.seedRelations({
+      workspaceId,
+    });
+
     await this.devSeederPermissionsService.initPermissions(workspaceId);
 
     await this.devSeederDataService.seed({