We have 3 workaround solutions for this
a. Mark the Number allocation at posting setup in Journal forms
https://technet.microsoft.com/en-us/library/aa556237.aspx
https://technet.microsoft.com/en-us/library/aa552517.aspx
b. When you get the error message find the number sequence that is having the issue ,
Organization administration/Common/Number sequences/Number sequences
select that number sequence, click on Manual Cleanup>current
Note : DO NOT CLICK ALL option
c. Deleting records in status list
Find the number sequence and click status list .
Delete using Alt+F9 option
Microsoft Disclaimer: Microsoft’s suggestion are recommendatory in nature and the partner/customer should fully test any suggestions provided before applying them in production environment. Microsoft will not take any responsibility for any issue that arises because of this.