Issue loading TTK an Ship data on specific ship combinations.

Issue where specific ships or combinations of ships lead to no data being loaded which results in a bad TTK calculation or no TTK data being calculated for that combination.

<img width="1385" height="837" alt="Image" src="https://github.com/user-attachments/assets/87591140-c35f-4529-9ea2-6739c9e5144c" />