Database shows an error but I cannot see any error

Data Browser does not allow to access a table because of the following message. But as you can see the column “monthlyCohortNumber” does exist. And there are 4 records in that table. I tried to delete this column, but without any success. Please advise, I am running out of ideas.

AppID A2090C1B-936C-A876-FF32-277A55A60700

What table you are talking about?
Contact?

I’ve checked.
Was able to open the table.

as indicated in the error it ewas the CostItem table

It is interesting that the CostItem table now looks very different than the one I have opened with the error. How could that happened?

I can not say anything definitely without deeper investigation.
But i can suggests the the server fix error automatically. (some simple inconsistency errors may be fixed on the fly).