This reports whether this port's APS configuration is not configured (feature off or a non-APS port), valid (configured and validated by the APS manager), or invalid (a conflict was detected between the working and protection line configurations). An invalid status here on this specific port means the APS manager has already detected that the paired working/protection configuration is inconsistent, and per the description the admin must actively correct the misconfigured port's settings themselves; the invalid state does not self-resolve. Seeing pportAPSconfigStatus report invalid on this port after changing pportAPSpairedSlotId elsewhere in the pair would mean that change introduced a conflict that needs to be corrected on one of the two paired ports before APS protection can be trusted again.