Eventing N1ql: DELETE with collection failing as `Keyspace not found`

function OnUpdate(doc,meta) {

    var docId = meta.id;

    var query = INSERT INTO dst_bucket.scope_1.coll_4 ( KEY, VALUE ) VALUES ( $docId ,'Hello World');

}function OnDelete(meta, options){

    try{

    var docId = meta.id;

    DELETE from `dst_bucket.scope_1.coll_4` USE KEYS $docId;

    }catch(e){

        log(e);

    }

} 

2020-11-04T11:11:56.828+00:00 [INFO] {"message":"SDK error : LCB_ERR_INDEX_FAILURE (402) Query error : {\n\"requestID\": \"ae8a6fce-c1fb-4797-b44d-890424c01576\",\n\"clientContextID\": \"10@n1ql.js(OnDelete)\",\n\"errors\": [{\"code\":12003,\"msg\":\"Keyspace not found in CB datastore: default:dst_bucket.scope_1.coll_4 - cause: No bucket named dst_bucket.scope_1.coll_4\"}],\n\"status\": \"fatal\",\n\"metrics\": {\"elapsedTime\": \"48.447017ms\",\"executionTime\": \"48.406053ms\",\"resultCount\": 0,\"resultSize\": 0,\"serviceLoad\": 25,\"errorCount\": 1}\n}\n","stack":"Error\n at OnDelete (n1ql.js:10:5)"} 

DELETE from dst_bucket.scope_1.coll_4 USE KEYS "newDocID2"