Air Traffic Control Time Certified In Pos 1 (yrs) 14
Confusion; Communication Breakdown; Workload; Situational Awareness; Fatigue
ATC Issue All Types; Airspace Violation All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance
Human Factors; Procedure
Aircraft X was climbing out of about 20;000 feet when I switched him to the High Altitude sector. He was handed off to ZZZ1 Center High altitude sectors. A little while later the low altitude sector pointed out an aircraft at 23;000 feet going eastbound. I was thinking that they were showing it to me because the same guy was working both planes but that was not the case. I got so use to ZZZ1 Center sectors being combined down there that I didn't put together that I hadn't pointed out the Aircraft X in the climbout to the low side and he didn't know anything about him pointed right at the other aircraft. ZZZ1 Center had to turn both planes last minute to avoid and situation. I ended up violating a sector in ZZZ1 Center and cause a unsafe situation with two aircraft they were forced to turn. I am trying to adjust back to a normal schedule and this is the first day shift I have worked since last month so my sleep schedule is a little chaotic as I am trying to adjust.Not sure anything is needed to be recommended it should have been obvious on my first day shift back in normal operations that things would not be the same as they have been because of the pandemic.
A Center Controller reported they assumed adjacent sectors were combined but they were not; which resulted in an airspace violation and two aircraft on conflicting routes entering the next facility sector.