Can add my friend to my island? Help me

[ItzYarinDragon]

Good day! I've been playing skyblock for quite some time and I got bored. I decided to add my friend to the island. I had a second account with a not very good history. Once I put my bow in a museum and couldn't take it back, it had the inscription: Co-op SoulBound. Now I'm afraid that as soon as I add my friend to the island, I won't be able to buy and sell items (Sell them on the auction of course). Can you help me, is this really true?

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