You are right @BrightSilence.
In my case the solution was to stop the node and remove all .db files from storage folder. Then I started again the node and it regenerate all the .db files and start working fine like before.
The downside of remove the .db files is that statistics and Dashboard information was lost. It is preferable to restore the .db files one by one, as @BrightSilence said, instead of remove the .db files.
This worked in my case, not all issues with the .db files are the same. Use this topic as usefull information not a definitive solution, and before following the steps I followed, explane your case to the community.