紧急求助！！！quartus2出现这样一个致命的警告，不知道如何处理了
Warning: Circuit may not operate. Detected 56 non-operational path(s) clocked by clock "sec_modC" with clock skew larger than data delay. See Compilation Report for details.这样的警告出现了好多个，波形仿真都出不来，高手们知道如何处理吗？？求助，紧急求助。。。。。。。。。。。。。。。。 我将默认时钟调为50MＨＺ，上面警告哦明日了，但是又产生以下警告。Warning: Can't achieve minimum setup and hold requirement sec_modC along 57 path(s). See Report window for details.，高手们，给点思路
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