Please help us help you and fill where relevant:
Your LimeSurvey version: Version 5.6.36+230830
Own server or LimeSurvey hosting: Own server
Survey theme/template: Fruity
==================
Hi,

On my Version 5.2.9+220110 website archive copy, for a sample question, I have the condition (( MGM-060-1.NAOK == "A1" or MGM-060-1.NAOK == "A2" or MGM-060-1.NAOK == "A3"))

On the production Version 5.6.36+230830, for the same question: ((MGM - 060 - 1.NAOK == "A1" or MGM - 060 - 1.NAOK == "A2" or MGM - 060 - 1.NAOK == "A3"))
It seems it adds space and that break the condition.

On the editor, the condition appears without those spaces:
((MGM-060-1.NAOK == "A1" or MGM-060-1.NAOK == "A2" or MGM-060-1.NAOK == "A3"))

If I go to the condition editor, delete all three conditions and add them again: same.

Is there something I can do to have my conditions to work again?

Best regards

One more thing: PHP is the same on the two websites (5.2.9 & 5.6.36)

As far as I know, you cannot have dashes in question codes.

www.limesurvey.org/manual/Questions_-_introduction

Note: The question code must be unique across the same survey, must start with a letter, and can only contain alphanumeric characters.

Not sure why it works in your 5.2.9+220110, but it actually shouldn't.

Thank you @tpartner & @holch !

I suppose those dashes are there since a long time, when Lime SUrvey 2.x was used. I will check how we can cope.

Best regards