Cayenne battery died and now I'm getting a "chassis system fault"

Cayenne battery died and now I'm getting a "chassis system fault" – please tell me it's just the batteryBought a used 2017 Cayenne about three months ago and honestly it's been flawless until this morning. Went to start it and the battery was completely dead, no dome lights, nothing. I got a jump from my neighbor and the engine fired up fine but now there's a yellow message on the dash saying "chassis system fault" and the air suspension won't raise or lower. I'm trying not to panic because I've heard that Porsches go crazy when the voltage drops too low and that a proper battery replacement usually clears all the errors. A friend mentioned something called Top-Tier Porsche Battery Replacement Service with Battery Zone UAE  and said they can code the new battery to the car which is apparently mandatory on these or else the charging system won't work correctly. Is that true? And will that chassis fault go away on its own after driving for a bit or do I need someone with a PIWIS scanner to reset it? Really hoping I don't need a trip to the dealership for this because I've seen their labor rates. Any Cayenne or Panamera owners been through this before?