• Lunar version: 1.2.1
• Laravel Version: 12.42.0
• PHP Version: 8.3.28
• Database Driver & Version: MySQL 8.0.37

Expected Behaviour:

When creating a product and its related variants, the weight_unit field should default to a valid weight measurement unit, such as kg, g, or lbs.

Actual Behaviour:

When a product variant is created, the weight_unit field is automatically set to mm by default in the database.
mm is a length unit, not a weight unit, which leads to incorrect or inconsistent behavior when weight-based logic (e.g. shipping rates, weight calculations) is applied.

Steps To Reproduce:

1. Create a new product in the Lunar admin panel..
2. Check the database record for the created product variant.
3. Observe that weight_unit is set to mm by default.