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Important note here is that we don't need to have the script on publishers area any more to use the same script with different IDs. Only the IDs need to be stored correctly at Publisher level:
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If a variable appears in a global script, it must be defined also in global scripts. It acts as a "safety" in case such a variable is not added in the publisher's scripts.
There is also a validation that a variable cannot be added in a global script if it is not created yet.
The following can be defined within the scripts:
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