Flight Attendant reported the flight crew elected to perform a diversion due to brake error messages. The aircraft landed and taxied safely off the runway.

Narrative

We had just gotten out of sterile heading from ZZZ1 to ZZZ when the red flashing lights and Captain calling for emergency. I was just getting my cart ready for service. I answered and Captain said he was calling for priority handling. Our breaks were giving him errors. He said he wasn't sure if it was correct since the light kept going off and on but to be safe we were heading back to ZZZ1. He said we had time since we had to burn off fuel. He said he wanted us to do the brace commands to be on the safe side but that we wouldn't do an evacuation. We would do a standard deplaning at the gate. Worst case scenario we would have stairs brought to us on the Tarmac. After getting off the call W Flight Attendant came to the back. We checked our time. We put all the service stuff away in the back and I pulled up the planned Evac Checklist. I started making the announcements per the manual. We had the cabin lights turned to full bright and A FA (Flight Attendant) and a dead heading FA did the brace position demo while I read. After walking through the cabin and making sure everyone was doing it correctly and giving additional info to the parents with lap children; we secured everything and top our jump seats. Turning out the cabin lights. At that point we still had time and we had some people using the restroom. When sterile came on we locked the lavatory doors in preparation. A few moments later I had a father and child come to the back at which time I advised him that they needed to return to their seats and buckle. After a few moments of advising they could not use the restroom at that time that they needed to return to their seats because we were about to land; they finally complied. At Captains' command I shouted the brace commands until we landed and taxied off the Runway. We deplaned with no issue. I then went to the other plane and worked the same flight out.