How to buy the Silent Fox ship

Hi today I post here because I do not manage to purchase the Silent Fox vessel M Fox while my ship is synergy level 6. thank you for helping me goodbye.

In the last update, they modified the levelling mechanics. You now need a certain number of ships of previous ranks. Here is the info from the patch notes:


Changed requirements for ship purchase
You need to buy and develop the previous ship to a certain synergy level
You need to buy a certain number of ships from previous ranks
These requirements do not affect Premium and DLC ships
Premium and DLC ships are accounted for when buying other ships

Me I have everything, the price and all, but they tell me “Requires a level vessel 8 or more” something like that, so if you can help me thank you

screen shots would be helpful, you know