UNKOWN REF Item on inserts

On insert to a InnoDB table, getting this error/warning UNKOWN REF Item while reading from Columnstore tables.

create table innodb_txn_ids (TransactionID bigint(20) unsigned primary key,
SubscriberID bigint(20) unsigned, ServerID int(11) unsigned) Engine=InnoDB;

insert into innodb_txn_ids (TransactionID,SubscriberID,ServerID)
select t.TransactionID,t2.SubscriberID,t2.ServerID
from transactions.transactionsTracking t
join transactions.transactionlog t2 ON t2.transactionID = t.transactionID
where t.processed IN ("?","S");