diff --git a/src/migrations/20260302_180000_add_social_platforms_missing_columns.ts b/src/migrations/20260302_180000_add_social_platforms_missing_columns.ts
new file mode 100644
index 0000000..1fb671a
--- /dev/null
+++ b/src/migrations/20260302_180000_add_social_platforms_missing_columns.ts
@@ -0,0 +1,28 @@
+import { MigrateUpArgs, MigrateDownArgs, sql } from '@payloadcms/db-postgres'
+
+/**
+ * Add missing columns to social_platforms table.
+ *
+ * The SocialPlatforms collection config has apiConfig.oauthEndpoint and
+ * apiConfig.tokenValidityDays fields that were added after the initial
+ * community phase1 migration but never migrated to the DB.
+ *
+ * Without these columns, any query that resolves social_platforms relationships
+ * (e.g. creating community-interactions) fails with:
+ *   "column social_platforms.api_config_oauth_endpoint does not exist"
+ */
+export async function up({ db }: MigrateUpArgs): Promise<void> {
+  await db.execute(sql`
+    ALTER TABLE "social_platforms"
+      ADD COLUMN IF NOT EXISTS "api_config_oauth_endpoint" varchar,
+      ADD COLUMN IF NOT EXISTS "api_config_token_validity_days" numeric DEFAULT 60;
+  `)
+}
+
+export async function down({ db }: MigrateDownArgs): Promise<void> {
+  await db.execute(sql`
+    ALTER TABLE "social_platforms"
+      DROP COLUMN IF EXISTS "api_config_oauth_endpoint",
+      DROP COLUMN IF EXISTS "api_config_token_validity_days";
+  `)
+}
diff --git a/src/migrations/index.ts b/src/migrations/index.ts
index e0ec4fc..94000d7 100644
--- a/src/migrations/index.ts
+++ b/src/migrations/index.ts
@@ -39,6 +39,7 @@ import * as migration_20260215_120000_add_monitoring_collections from './2026021
 import * as migration_20260216_150000_add_card_grid_icon_fields from './20260216_150000_add_card_grid_icon_fields';
 import * as migration_20260217_120000_add_tenant_to_forms from './20260217_120000_add_tenant_to_forms';
 import * as migration_20260228_150000_add_html_embed_block from './20260228_150000_add_html_embed_block';
+import * as migration_20260302_180000_add_social_platforms_missing_columns from './20260302_180000_add_social_platforms_missing_columns';
 
 export const migrations = [
   {
@@ -246,4 +247,9 @@ export const migrations = [
     down: migration_20260228_150000_add_html_embed_block.down,
     name: '20260228_150000_add_html_embed_block'
   },
+  {
+    up: migration_20260302_180000_add_social_platforms_missing_columns.up,
+    down: migration_20260302_180000_add_social_platforms_missing_columns.down,
+    name: '20260302_180000_add_social_platforms_missing_columns'
+  },
 ];