How to resync ^ROUTINE and ^rINDEX?

I have a few routines in ^rINDEX that are missing in ^ROUTINE. At least some of those routines lack a timestamp, probably Date and Time Modified in ^rINDEX. It causes D %RO crash when such a routine is referenced by a routine range, since "" is an illegal $ZDTH value.

Healthy entry (note the timestamp): ^rINDEX("ABC,"INT")    =    $lb("2021-06-15 15:08:38.846885",)   ;The second argument is sometimes present and sometimes not, likely the routine size.

Unhealthy entry (note an empty timestamp): ^rINDEX("DEF,"INT")    =    $lb("",21) 

Finally, a question, not only for this situation. Is there an official, or a recommended way to rebuild rINDEX, maybe ^ROUTINE too. rINDEX has quite a few various purpose nodes, so it's probably not as straightforward as creating or deleting its nodes above based on ^ROUTINE entries.