$belongTo issues with otherKey

Need Help
#1

A model defined a $belongTo relationship using

       "external_platform_resource_link" => [
            ExtResourceLink::class,
            'scope' => 'isActiveWithoutGlobalScope',
            'key' => 'external_platform_resource_link_id', // key coolumn on Course model
            'otherKey' => 'resource_link_id' // otherKey column on related model
        ],

when I try to access the relation $this->external_platform_resource_link, I got an exception
and when I look in DebugBar at the sql query generated it seems that it is not using the proper key

select * from `ext_resource_links` where 
`ext_resource_links`.`id` = 'TPQI-VC033' and 
`ext_resource_links`.`site_id` = 1 limit 1

And also, It does not use the defined scope isActiveWithoutGlobalScope in the relation definition.

it should generate this sql as per the relation definition for the otherKey binding

select * from `ext_resource_links` where 
`ext_resource_links`.`resource_link_id` = 'TPQI-VC033'

If this is a bug, it would be strange indeed, so I am guessing I am doing something wrong, but what ?

#2

the relationship was already defined from another plugin.
So there were a conflict apparently.

It would be great to have a warning in that case.