I have an unit #2146934216 which is dated 3 Feb 2021 but still in status : Completed, waiting for validation. funny and seems it is forgotten.

In late January/early February 2021 the MW project had problems because the work unit numbers had grown so large that the database could not store them in a 32-bit integer any longer! Plenty of messages on the topic back then, but newcomers might be unaware...

The solution involved taking the project offline and renumbering everything; however, some results of some work units got isolated for one reason or another, so the system did not clean out the result records properly. Those records are likely to linger until someone with a lot of patience goes through and sifts them out (messy and time-consuming) or the database can be completely reconstructed from scratch (don't know how feasible that is if it actually contains live data...)

So yes, your record is "forgotten" -- just ignore it.

Cheers - Al.

P.S. I have over 100 old result records in that state :-)