Weird behavior - automatic sets generation

[DIUANA]

Code sample or context

Expected result

map_tec_time and map_tec_act set as:
X, node, year time=[SUMMER, SPRING, WINTER, FALL]

Problem description

Dear I hope you are fine and safe.

Let me try to explain this issue properly.

I have 4 sub time periods: [SUMMER, SPRING, WINTER, FALL]
and a parent time which is YEAR

I have a technology X that works on the sub-annual time, however, if I set a relation XR associated to this technology X when IXMP generates the gdx file it creates a map_tec_time and a map_tec_act sets (that are generated automatically) with time year also associated to the technology X.

Therefore, instead of get the result for map_tec_time as I was expecting, such as:
X, node, year time=[SUMMER, SPRING, WINTER, FALL]
I got
X, node, year time=[SUMMER, SPRING, WINTER, FALL, YEAR]

If I try to pass those sets to the model manually I get the following error message:
com.gams.api.GAMSException: Symbol map_tec_time exists already

Also if I do not set a relation associated to the technology it generates the result as expect, withou the year in the aforementioned sets.

How can I deal with this issue?

All the Best and thanks in advance.

Versions

'2.0.0'

Output of ixmp show-versions

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[khaeru]

This appears to be the same situation/error reported at iiasa/message_ix#348, so closing as a duplicate.