axi BFM as slave and DMA as axi master

I use axi BFM as slave and DMA as axi master and I get the following error:

You can see in the waves that there is continuous writing from the master and the slave does not understand that there are 2 writings so it returns one bvalid, in addition you can see that this error affects awready and causes it to be high afterwards, due to this error then the DMA stops sending writings