Upgrade

I want to upgrade SuiteCRM 7.1.7 to SuiteCRM 7.3.1, Someone please guide me how to upgrade the same.

Hi,
Upgrading is fairly safe and easy, but it still may be worth taking a backup of your Instance beforehand, if you are concerned. You can take a backup of the CRM itself via Admin > backups, but keep in mind that this does not back up your DB.

You can download the Upgrade package here: https://suitecrm.com/download
Ensure that you download the “SuiteCRM Upgrade 7.1.X to 7.3.1” package. It will download as a .zip file. Do not extract the file as it needs to be in the .zip format.

On your CRM, go to Admin > Upgrade Wizard and follow the steps shown.

After the install is complete, Run a few Quick Repair & Rebuilds from Admin > Repair, and run the “Execute” option if shown.
It also may be worth re-setting permissions to ensure they are correct again.