Update Failed: Files and database are already up to date-WHMCS 8.13.1

[Sudipto Mahmud]

Update 8.13.0 to 8.13.1 error. after update i get this message "Update Failed: Files and database are already up to date".  then WHMCS say delete the install folder after delete everything is ok. WHMCS is up to date.
But what is "Update Failed: Files and database are already up to date" ?

[Sudipto Mahmud]

I need to know.

[WHMCS John]

Hi @Sudipto Mahmud,

An "Update Failed: Files and database are already up to date" error message can occur if you (or another admin) navigated to another admin area page - such as in a second browser tab -  whilst the auto-updater was in progress.

Deleting the /install directory is the correct solution as you can be assured the updated files and database changes have been applied.