handle_subversion_warning() was reporting with RPT_ERROR type, replaced with RPT_WARNING. RPT_ERROR would stop python scripts opening files written by newer Blender binary with bpy.ops.wm.open_mainfile(), preventing further code from running. This does not seem right since Blender itself still loads the files. Ran into this checking T100446 in 2.93. Differential Revision: https://developer.blender.org/D15712