-VE 70 The KUID tag is not a valid KUID value: '<value>'.
The KUID <value> is not formatted as a valid KUID. Valid formatting for KUIDs is described here.
interior 101202 - VE70: The KUID tag is not a valid KUID value: '101202'.
texture-kuid "_" - VE70: The KUID tag is not a valid KUID value: '_'.
The first example occurs in very old assets that use a form of KUID numbering that is not longer supported. The correct KUID in this case is <KUID:-1:101202>.
The second example commonly occurs when the texture is to be replaced by script, and there is no default texture. In that case any texture can be inserted as the default, as it will be replaced before the model is displayed.
The error will also occur if the KUID has been corrupted.