Oracle Solution for Error ora-13457

ORA-13457: bitmap mask cell data error: string

What triggered the Error:

There was an error in the cell data of an original bitmap mask or in the cell data of the pyramids of a bitmap mask.

What should we do to fix it:

If the error is related to an original bitmap mask, remove the bitmap mask. If the error is related to the pyramids of a bitmap mask, delete the pyramids and regenerate them.