Hi, you cannot upgrade in openSUSE Tumbleweed using commands sudo zypper up nor sudo zypper dup because every new version has different vendor.
As workaround you have to use specific version e.g. sudo zypper up insync-3.4.1.40977-fc34.
Then output is:
Loading repository data...
Reading installed packages...
Resolving package dependencies...
The following package is going to be upgraded:
insync
The following package is going to change vendor:
insync @55efc2a19da8 -> @4f482aab68a7
1 package to upgrade, 1 to change vendor.
Would be great if the vendor remains the same to make upgrades smooth. Thank you