There is a limit to how many equipments or gears you can have. You can see them in the admiral profile at the top left beside the spinning big circle. In that profile there will be info about the # of ship girls you got, current amount of furniture, your equipment limit which is probably at 500+, the name of the server where you belong, etc. and also your ranking if you click a different button. To see the admiral profile go to https://kancolle.fandom.com/wiki/Tutorial:_FAQ then search [how do I see which server I belong to?] then compare it with this https://kancolle.fandom.com/wiki/Servers to see your server name.
to open 145, clear B62
-Sheep Mini-Game Phase Scores-
Hit these scores to move on to the next phase.
Phase 1 - 2500+
Phase 2 - 5000+
Phase 3 - 15000+
Phase 4 - 50000+
Final Phase - 150000+
Akitsushima in 3-4?!
Which one?
The last Anniversary quest, had to redo it all again.
It was indeed that one ey, must have been hard work, but yeah easy to make a misstake and difficult to troubleshoot, sounds like you got it tho, so nice job! May I ask what shipgirl you picked?