Rangers boss Stuart McCall says he feels sorry for Gael Bigirimana, but admits he should never have been signed.
Chris Gunter will stay at Reading, after the club took up the option to extend his deal by another year.
Peterborough have completed the signing of Wrexham defender Nat Knight-Percival on a two-year contract.
The 25-year-old departs the Blue Square Bet Premier play-off semi-finalists to link up with the London Road outfit on a free transfer.
He told PUTV: "I am really excited to be a Peterborough United player and I can't wait to test myself in the Championship.
"I spoke to (Wrexham team-mate) Dean Keates and he told me he had one of the best periods of his career at London Road.
"I can't wait to get started, I am really pleased to be here.
"It is a massive step up but I am really looking forward to it."