Ships Taken Away From Me Given By Allie

[hanniblejulien]

In Arena 536 My Allie Gave Me About 12 Or So Ships But They Where Very Advanced Because I Dont Have A Key I Left The Game And When I Came Back The System Said It Took The Ships Away Because They Are To Advanced For Me Since I Dont Have A Key And Before These Ships My Allie Also Gave Me Ships That Where More Advanced Than Me And There Still There So Something Is Not Right

[LG Institute]

Off topic slightly, but should still be explained:
Troopers and settle ships cannot be transferred (terraformers can). Additionally ships cannot be transferred if the quantity of ships transferred would put the receiving empire above 1000 ships.

As to your question:
ships can't be used if they have a science value to a component that exceeds the maximum science limit for an unkeyed player. This might immediately get you to think that AM tech ships can't be transferred - but no...although AM/warp main tech has science above 90K, the individual components cost less research than that.

It would probably help clear things up if the transfer was blocked to begin with, rather than deleting your ships after-the-fact. So, in that matter it is a bug (the ships shouldn't have been deleted, but the game should be written so the transfer couldn't happen to begin with...). But the fact that you cannot use those ships is not a bug.

[LG Institute]

In Novice arenas (100K limit), Type II Lasers and Phasers are permitted. In standard arenas (90K) they aren't allowed. Same with temporal engines, warheads, shields, heavy repair and quantum scanner. Techs above that cost aren't allowed in any arenas, and techs below that limit are allowed in all arenas.

Note that ship size is not a "component". An ally could transfer a Massive time-tech ship (with heavy (lunar) repair and quantum (BH) scanners) to you in a novice arena and you could play with it.