Quick fix, only allow using SQL.

packages/builder/src/components/design/PropertiesPanel/PropertyControls/FilterEditor/FilterDrawer.svelte

@@ -26,7 +26,7 @@
 
   function getTableFields(linkField) {
     const table = $tables.list.find(table => table._id === linkField.tableId)
-    if (!table) {
+    if (!table || !table.sql) {
       return []
     }
     const linkFields = getFields(Object.values(table.schema), {

packages/server/src/integrations/utils.ts

@@ -1,6 +1,5 @@
 import { SourceNames, SqlQuery } from "../definitions/datasource"
 import { Datasource, Table } from "../definitions/common"
-import { SourceNames } from "../definitions/datasource"
 import { DocumentTypes, SEPARATOR } from "../db/utils"
 import { FieldTypes, BuildSchemaErrors, InvalidColumns } from "../constants"