A max delay constraint with -datapath_only has been applied between <PIN_NAME> and <PIN_NAME>. The startpoint(s) and endpoint(s) either belong to the same clock domain or belong to two clock domains that can safely be timed together. It is only recommended to use the -datapath_only option on paths between clocks that do not have a known phase relationship. This DRC is waived when a synchronizer is found on the path endpoint.