ID:181022 Can't place <name> due to conflicting region constraints made to <name>.

CAUSE: The Fitter cannot place the DQS I/O group fed by the specified DQS I/O pin. The most probable cause of this placement error is a region or location constraint conflict between pins in the DQS I/O group and the associated delay locked loop (DLL) of the group. If you did not make a region or location assignment to either the DLL or pins in the DQS I/O group, then this error might also indicate that there are not enough available locations to place all of the DQ I/O pins in your design.

ACTION: If you made a location assignment to the specified DQS I/O pin or DLL, remove the assignment if possible. Otherwise, remove the location assignments to the DQ I/O pins or the nDQS I/O pins associated with the specified DQS I/O pin. If this does not result in a successful fit, compile your design, targeting a larger device.