Disappearance meta keywords on modification

[perseas]

When trying to modify metakefoords  of an already stored Article, does not pass the new keywords but remains BLANK when i save it.
Why is this happening ?
Does anyone know anything about this, How to resolve?

Thanks in advance

[webgift]

I haven't noticed such an issue before. Can you please provide me access to the your
back-end using Private Message?

[perseas]

Thanks for your answer.
Problem solved and there was only on a few posts.
I Repair it through the db and phpmyadmin. I could not find by what occurred.

[webgift]

You are welcome @perseas!