abcde

在ISE综合时出现如下警告信息，请问是否有大侠遇到过？
如何解决？

Optimizing unit ...
INFO:Xst:2261 - The FF/Latch in Unit is equivalent to the following 11 FFs/Latches, which will be removed :
WARNING:Xst:638 - in unit flashRead_tb Conflict on KEEP property on signal Inst_flashRead/Mtridata_addr<7> and Inst_flashRead/Mtridata_addr<8> Inst_flashRead/Mtridata_addr<8> signal will be lost.