E3004: This package is for device: gts210vewifi; this device is I'm trying upgrade a Samsung Galaxy Tab S2 9.7 Wi-Fi (2016) AKA gts210vewifi from a LineageOS 18 April 2017 to a 30 July 2018 build, but it fails printing this in TWRP:

E3004: This package is for device: gts210vewifi; this device is .


What does this apparently broken error message mean? -- Someone suggested that perhaps I "need to upgrade the firmware".. how would I need which version this new build requires?
OK, so this means that you have an outdated version of TWRP which, apparently, does not correctly report the device model name (it's empty).  -- 
Updating TWRP from 3.1.0-0 to latest is 3.2.2-0 solved this problem!