This allocation has already been submitted for processing and cannot be resubmitted. Please use the

Hi Team ,

Since 2-3 days we are geting this error "This allocation has already been submitted for processing and cannot be resubmitted. Please use the Pending Transactions form to check the status of this allocation." in Transact Move Orders form and when we are reproceesing the stuck transation in Penidng transaction form the issue resloved , also we are getting lots and lots of records stuck in pensing transaction form , can you let me know what is the cause of this issue and how to solve it . Thankyou .