Quartus

One or more clock settings are derived from the absolute clock settings <name>. Deleting the absolute clock settings also deletes all derived clock settings.

CAUSE: In the Timing wizard (Project menu), you attempted to delete absolute clock settings, but the Quartus II software derives one or more clock settings from the absolute clock settings. The Quartus II software is warning you that deleting the absolute clock settings will also delete the clock settings derived from the absolute clock settings.
ACTION: Click OK to delete the selected settings for absolute and derived clocks, or click Cancel to leave the clock settings unchanged.

- PLDWorld -

 
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