Problem with the AXI user signals

Hi,
I created an AXI peripheral IP with one slave and one master AXI port.
When I connect it to my desing to the AXI crossbar the user signals width of my IP is automatically updated according to it.
When I change the user signals width to a value larger than zero the width is updated in my IP.
However, when I change it to zero the value in my IP does not change to zero.
Since I use a microblaze core at one side of the AXI crossbar I need to define the user signal widths to zero, otherwise the validation is failed.
Any one can help with this problem ?
thanks.

No.
I am using an AXI crossbar to connect 4 slaves to 1 master.
The problem is that when I change the user signal width in the axi crossbar to a number > 0 and validate the design it affects my AXI peripheral. But, when I change the width to zero and validate the desing it does not affect its width.
 

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