(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
here is the fix
For SQLite
Database Location
C:\P6localDB\Mydatabse.db or wherever yours is located and named.
5. Run the following queries: by selecting the tab Execute SQL
delete from projshar; Then press the play button
delete from usession; Then press the play button
6. Click Write Changes then close the utility.
7. Login to P6 Professional and test.