[Решено] The stock balance is not consistent for the same product across different language versions.

Background of the issue:
I am managing an online store using WPML and have created a product that should have the same stock balance across different language versions. Previously, this was working correctly.

Symptoms:
The stock balance for the Finnish version of the product is 0, while the English version shows a stock balance of 1.

Questions:
What could be causing the stock balance discrepancy between language versions?
How can we ensure that stock balances are the same across all language versions in the future?