It got cancelled before it got announced
The Seoul Metropolitan Government released the document:
Cancellation of approval for using Jamsil Olympic Stadium and Processing of Return (2022 IU Concert)
[...]
Article 11(4) of the Seoul Metropolitan City Ordinance on the Installation and Operation of Sports Facilities (Return of usage fees). If it becomes impossible to use the facilities at all due to unavoidable reasons such as natural disasters and the game or event can’t be hosted, the full usage fees and admissions fees will be returned.
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