Why was I forced to set the bounty to 50 reputation when I had 78?

Question

I was forced on this question to set the bounty to 50 when I had 78, Why?

Answer 1

I was forced to set the bounty to 50 when I had 78, Why?

Bounties must be increments of 50: 50, 100, 150 etc so you cannot set a bounty of 78 and you don't have enough reputation to set a bounty of 100.

See How does the bounty system work? - Meta Stack Exchange