Entry does not exist in SKB1 when copying G/L line item on FV50

Hi All

While parking a journal on FV50, if I use the copy function to copy the previous line item, I am getting error Message no. 00058: Entry does not exist in SKB1. I have checked the G/L accounts and it is extended to the Company Code and double checked on table SKB1 and the account is also there. Would anyone know why I am getting this error only when I try to change the G/L account for a copied line item? Your input is highly appreciated.