To make it simple, the normal procedure will be asking your appointed forwarder O.T.S to amend invoice number from # 6145880 à6146831; 6146809 à 61456916 on the AWB.
There should be no issue for your forwarder to amend this. Both invoice # on AWB and HAE invoice will then be aligned.
This is also to ensure that your finance departure can settle invoice against correct HAE invoice # as the original invoice number 6145880 and 6146809 are invalid