Bash local nameref declaration does not work

I am trying to set a local variable in a function with nameref. The script code is the following: #!/usr/bin/bash msg=hello myparam='' superfunc () { productfile=$1 local -n refmyparam=$2 } superfunc $msg $myparam echo $myparam When running it I get the error: line 7: local: `': not a valid identifier We use **GNU bash, version 5.2.21**