Please provide an On the Ground evidence for this Statement.
The Wikipedia article is not a valid source. The entire surrounding Area is the "Nordpark". Facilities related to Borussia Mönchengladbach are "Borussia-Park" - nowhere - even not on the Website of the Owner or on street signs you will find "Stadion im BORUSSIA-PARK" https://www.borussia.de/stadion-und-vereinsgelaende
https://www.moenchengladbach.de/de/leben-in-mg/orte/borussia-park
It takes me 15 minutes to get to this place - not sure how close you are to proof local knowledge.
I recommend you stop these changes until you share your - verifiable - source.
BR tux67