Wrong bom filtering for multi variant products

[wojtek1044]

Module

mrp.multi.level

Describe the bug

Wrong bom is selected for explosion when product template has many variants. Procurement is calculated from first bom of the product template list, not regarding to ID from product.product module.

To Reproduce

16.0 community

Steps to reproduce the behavior:

1. Make demand for product with defined variants and different boms for every variant (mrp.bom.product_id defined)

2. Run MRP multi level

3. Check plans for affected subproducts

4. Rearange bom list in view
   

5. Again run MRP multi level and check procurement plans

Expected behavior
When product has defined variant and bom for that variant - predict procurement according to the right bom.

Additional context
Add any other context about the problem here. (e.g. OS, Python version, ...)

[github-actions]

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