Hi@ster!
Even if the terminal is not currently online, if there is an address allocation record before, it cannot be statically bound. The correct steps are as follows:
1. Check whether the terminal has an allocation record:
display ip pool name ABC all | in ABCD-1234-ABCD
2. Delete the distribution record:
reset ip pool name ABC 1.2.3.4 (IP address found in the previous command)
3. Statically bind the MAC and IP in the address pool:
static-bind ip-address 1.2.3.4 mac-address ABCD-1234-ABCD
Hope it works for you!