I have a question regarding product variants. 

We have been using Odoo Enterprise v11 for a year now, with the variants functionality turned off (due to several historic company process-related reasons). This means that instead of having the different colors of a device as a variant, all colours are individual product templates.

Now we want to start using the product variant functionality without losing all the sale history, reporting and notes relating to the products. This means we can't just create a new product template with variants and start over, but we want to convert the old product template to a product variant of a new product template.

Is this in any way possible without losing all the history related to this product without having to buy/commission a plugin in Odoo Enterprise V11?