MongoDB Error Duplicate key

I sometimes get this error when authenticating with MongoDB:

errorResponse: {
apps/backend dev:     index: 0,
apps/backend dev:     code: 11000,
apps/backend dev:     errmsg: 'E11000 duplicate key error collection: pushwave.sessions index: id_1 dup key: { id: null }',
apps/backend dev:     keyPattern: { id: 1 },
apps/backend dev:     keyValue: { id: null }
apps/backend dev:   },


It is because my id is saved under column _id not
id
therefore all sessions have id null - duplicate.
How can I change which column is checked for ID? Because until now the only possible fix was to delete all sessions from table.
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