Exception using binding parameter

Hi.
I'm deploying a c# (.net 6) httptrigger function with a blob output binding parameter but every time a deploy a new versión of my function I get this error when I run it:

Exception binding parameter 'outputBlob' Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.
...
Status: 403 (Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.)
ErrorCode: AuthenticationFailed

Additional Information:
AuthenticationErrorDetail: The MAC signature found in the HTTP request '(some key...)' is not the same as any computed signature. Server used following string to sign:

I'm absolutely sure I'm using the correct connection string to my storage account.

And the only way to make it work is deleting the existing blob file binded as output and then the function works again. But obviously I don't want to delete my files every time I publish a new version of my function.

If you need more information please let me know.

Thank yoy very much