Even if Cycles is not the active render engine, this versioning code could affect Cycles if a material was used with Cylces in another file (using linking). Fix this by spliting the output node into another one that only affects EEVEE.
Even if Cycles is not the active render engine, this versioning code could affect Cycles if a material was used with Cylces in another file (using linking). Fix this by spliting the output node into another one that only affects EEVEE.