If you have not achieved the required number of lots for your current level within the specified period, your level will be downgraded to the next month.
Even if you are downgraded, you will be upgraded the following month if you meet the requirements for that month.
Also, please note that if the number of lots remains at 0 for more than 6 months while the level is "GREEN", the IB qualification will be suspended and the IB partner registration will be invalidated.