i was playing battlefield 1 still today but i cant play with same key anymore

How Origin and accounts work:
Serial keys you use in Origin games are single use and when you use one, while being logged on to an Origin account, the game associated with the serial key binds itself to that account. After this the serial is useless for anything other than retrieving your account should it be hacked or lost.
If you’re using an Origin client on any computer after that – log into the account, then you will see the game there without the need for you to enter any serial key. This is how serial keys work in Origin, Steam and practically everywhere else you have multiplayer games and it has been like this for ages.
To sum up:
Serial Keys / Game Keys: can only be used once -> after that the game is on your account. Log into that account and the game will be there 🙂

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@chavregas wrote:

i was playing battlefield 1 still today but i cant play with same key anymore if i enter same key to reddem its says this key has already been used please help me 

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Are you receiving the need to reactivate your game error?

Hello @chavregas 

Are you logged in with the same EA Account? Can you see Battlefield 1 in your game Library?

ty for everyone answered my question

i bought key from g2a i played it like 1mont after i log into account but it says the key have already used but i am sure i used that key for that account i couldnt get solve for this problem, after i bought bf1 one more time but this time i bought that from origin and i used key its worked when i entered the game my character is same how did i leave it was 12 lvl and now 12lvl all weapons same everything i same there is no difffrent i curious what happened my old bf1?(Soory for my englısh) ☹️