[16.0][subscription package] Field res.partner.subscription_product_line_ids: unknown parameter 'ondelete'

[skygunner]

Field res.partner.subscription_product_line_ids: unknown parameter 'ondelete', if this is an actual parameter you may want to override the method _valid_field_parameter on the relevant model in order to allow it

[skygunner]

So for simple type and One2many, it's not necessary to use ondelete