fix: do index creation only if relation found

Signed-off-by: Pranav C <pranavxc@gmail.com>

packages/nocodb/src/version-upgrader/ncXcdbLTARUpgrader.ts

@@ -77,7 +77,6 @@ async function upgradeModelRelations({
               childTable: relation.tn,
               foreignKeyName: relation.cstn,
             });
-          }
 
             // skip postgres since we were already creating the index while creating the relation
             if (ncMeta.knex.clientType() !== 'pg') {
@@ -90,6 +89,7 @@ async function upgradeModelRelations({
               await sqlClient.indexCreate(indexArgs);
             }
           }
+        }
         break;
     }