Hello.
I am running LimeSurvey 1.80+ with closed-access surveys.
I generate my tokens manually and they are always unique(non-repeating) in the token-table.
I noticed that some of my users filled in the survey twice using the same token.
Here is a screenshot from the response table.

Both responses have a valid 'submitdate' and 'completed' field.
Is this issue solved in the current version 1.90+?

This issue HAD to be solved in the last version. If not, put a bug report.




(I think it's solved)

Thanks for your reply.
I wonder if version 1.90+ is 100% backwards-compatible with 1.80+.
I have ongoing and past surveys with back-end tables in my database. Does the new version support tables created from 1.80+?

I am asking because I am afraid that after I upgrade to 1.90+, it will not play nicely with the old tables and I may lose response- and token-tables.

LS 1.90 are compatible with 1.80 database : an upgrade of the database are made..

But, you allways have to make a backup before upgrading, we can't test all contion of upgrading.
Did you have ability to make a backup of your database and your installation directory ?

You won't loose any data when updating. Only issue that might arise is that you might have to re-create customized templates.