Custom program error

0x1622

Appears in logs as custom program error: 0x16

Token-2022TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb

ExtensionAlreadyInitialized

“Extension already initialized on this account”

You tried to initialise an extension that is already present on this account.

Common causes

  • Running an Initialize* extension instruction twice, often on retry.

How to fix it

  • Read the account's extensions first and skip the ones that exist.

Decode another error

Try: