icx7250 won’t stack I get a “stack port e 1/2/1 has 1g speed-duplex settings” error

We have a
Brocade ICX7250 that will not stack. We atleast 40 sites with the same stack configuration. So this isn’t a new setup for us.When we do the ‘stack enable’ we receive the error: “stack port e 1/2/1 has
1g speed-duplex settings”.  With stack cables
you don’t need the license for 10G
for stacking.  Stacking cables are connected via the standard, 1/2/1 to 1/2/3 to the second switch, and vice-versa for the return to complete the stack circle.

Is this a known
issue with a fix for it?

Thanks. Steve.