fix(editor): only check entity validity if it is not a new entity

fixes #147

lib/manager/actions/versions.js

@@ -8,6 +8,7 @@ import {SECURE_API_PREFIX} from '../../common/constants'
 import {getConfigProperty} from '../../common/util/config'
 import {uploadFile} from '../../common/util/upload-file'
 import fileDownload from '../../common/util/file-download'
+import {ENTITY} from '../../editor/constants'
 import {getKeyForId} from '../../editor/util/gtfs'
 import {getEntityGraphQLRoot, getEntityIdField, getGraphQLFieldsForEntity} from '../../gtfs/util'
 import {handleJobResponse, setErrorMessage, startJobMonitor} from './status'
@@ -217,7 +218,9 @@ export function fetchGTFSEntities ({namespace, id, type, editor = false, replace
       .then(data => {
         dispatch(receiveGTFSEntities({namespace, id, component: type, data, editor, replaceNew}))
         const activePatternId = patternId || getState().editor.data.active.subEntityId
-        checkEntityIdValidity(data, type, id, activePatternId)
+        if (activePatternId !== ENTITY.NEW_ID) {
+          checkEntityIdValidity(data, type, id, activePatternId)
+        }
         if (replaceNew) {
           // FIXME Verify this is working properly.
           const {feedSourceId} = getState().editor.data.active