It says my frimpong in the lineup but i already took it but i cant sell him

Product: EA SPORTS FC Mobile
Platform:iOS
What's your device's make and model? Vivo
What's your device's firmware? Idk
What is your game version? FIFA moblie
In what game mode did the bug occur? Gameplay
How often does the bug occur? Rarely (0% - 9%)
What happens when the bug occurs? Nothing
What time did you see the bug? (HH:MM AM/PM) Day time

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I tried to sell my frimpong but it says it is in my line up but I already took it out but i still can't sell him.