ID:308086 (High) <text>. Found <number> asynchronous clock domain interface structure(s) related to this rule.

CAUSE: In the current design, the Design Assistant found the reported number of structures where unsynchronized data is transferred to state machines in asynchronous clock domains. To reduce metastability problems, each data bit should be synchronized with two or more cascading registers in the receiving asynchronous clock domain. The submessage(s) of this message list the structure(s) that the Design Assistant found.

ACTION: Synchronize all the data bits.