diff --git a/server/src/workspace/workspace-manager/standard-objects/activity.ts b/server/src/workspace/workspace-manager/standard-objects/activity.ts
index 62bd3bb99..b0a8c1533 100644
--- a/server/src/workspace/workspace-manager/standard-objects/activity.ts
+++ b/server/src/workspace/workspace-manager/standard-objects/activity.ts
@@ -1,4 +1,3 @@
-import { SeedWorkspaceId } from 'src/database/typeorm-seeds/core/workspaces';
 import { FieldMetadataType } from 'src/metadata/field-metadata/field-metadata.entity';
 
 const activityMetadata = {
@@ -137,11 +136,10 @@ const activityMetadata = {
       description:
         'Activity author. This is the person who created the activity',
       icon: 'IconUserCircle',
-      isNullable: false,
+      isNullable: true,
     },
     {
       isCustom: false,
-      workspaceId: SeedWorkspaceId,
       isActive: true,
       type: FieldMetadataType.UUID,
       name: 'authorId',
@@ -166,7 +164,6 @@ const activityMetadata = {
     },
     {
       isCustom: false,
-      workspaceId: SeedWorkspaceId,
       isActive: true,
       type: FieldMetadataType.UUID,
       name: 'assigneeId',
diff --git a/server/src/workspace/workspace-manager/standard-objects/attachment.ts b/server/src/workspace/workspace-manager/standard-objects/attachment.ts
index 94cea327a..e02116b9f 100644
--- a/server/src/workspace/workspace-manager/standard-objects/attachment.ts
+++ b/server/src/workspace/workspace-manager/standard-objects/attachment.ts
@@ -65,7 +65,19 @@ const attachmentMetadata = {
       },
       description: 'Attachment author',
       icon: 'IconCircleUser',
+      isNullable: true,
+    },
+    {
+      isCustom: false,
+      isActive: true,
+      type: FieldMetadataType.UUID,
+      name: 'authorId',
+      label: 'Author id (foreign key)',
+      targetColumnMap: {},
+      description: 'Activity author id foreign key',
+      icon: undefined,
       isNullable: false,
+      isSystem: true,
     },
     {
       isCustom: false,