How to change max_sp_recursion_depth on managed MySQL database

I have created a stored procedure that uses recursion and so I need to set the max_sp_recursion_depth system variable in order for it to work. When I try setting it via the console, I get the following error:

set global max_sp_recursion_depth=1
[42000][1227] Access denied; you need (at least one of) the SUPER or SYSTEM_VARIABLES_ADMIN privilege(s) for this operation

I’ve also tried setting it using doctl but I get the following error:

doctl databases configuration update <cluster_id> -e "mysql" --config-json '{"max_sp_recursion_depth": 1}'
Error: PATCH https://api.digitalocean.com/v2/databases/<cluster_id>/config: 422 (request "<req_id>") the mask must be set with which fields are being updated

How can I change system variables on DigitalOcean Managed MySQL Databases?