Johnny Manziel's trek to a club last night could create big legal problems for him ... he may have violated the terms of the deal in his domestic violence case.
Johnny and ex-GF Colleen Crowley each posted on social media they were at LIV night club in Miami Sunday night, but thing is ... she's got a restraining order against him.
As we previously reported ... Manziel struck a deal last month in which he agreed to complete anger management courses, keep his nose clean and not have any contact with Crowley for a year .