Why Do I Receive a Message Stating Market Data is Over the Limit?

Background:

When you open an account with us, you are initially set to receive a minimum of 100 concurrent lines of market data. This means that, either on our Trading Platforms (TWS, IBKR Mobile, Client Portal trading facility) or on API/third party interface, you can simultaneously feed 100 tickers with market data. As explained here, after the first month of trading, your allowance might be increased either automatically (based on your account equity/commission) or manually (by the purchase of Quote Booster packs.)

The same market data allowance is set for all the users of the same account, since it is based on account-wise parameters such as commissions and equities.