Poker rules, Blinds & All Inn bet

We play a lot of small tournaments in our town. Question is, if the blinds are 50 & 100, 6 players in the hand, player in position 1 goes all inn with 50 do all the other players (that want to call) call the 50 or do they have to post the 100 and form a side pot?

100 and form a sidepot.

And any more betting goes into side pot as well.

Thanks, but I didn't word the question correctly. 6 players, 50 & 100 blinds, 1st position goes all in with 150, 50 over big blind do the remaining players that want to play post 200, to stau with the raise, must be at least big blind amount, and form side pot, or do thay call the 150 and raise 100 if they want? sorry I wasn't clear on that

Players would have the option to call $150, because the person going all-in has not properly raised the bet. If a subsequent player wishes to raise I believe the minimum they could raise to would be $250 (current bet + 100 min.).