Mobile app sync error. System.ArgumentException: An item with the same key has already been added

Symptoms

Mobile application simulator does not work. System.ArgumentException: An item with the same key has already been added

Cause

This error is not caused by incorrect changes in the application configuration.

It islikely that localized strings were added to the mobile application's manifest, which duplicates the lines from MobileApplicationManifestMobile.

Solution

Update the application to the latest version (7.5.0) or change the localized strings in the custom schema (for example, "UsrMobileApplicationManifestCustom2Schema").

For example, add the "Custom" prefix in the name of localized lines.

Necessary conditions and possible restrictions

System administrator rights