Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Workload; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Provided Assistance
Environment - Non Weather Related; Human Factors
ZZZ Center was closed due to COVID decontamination on a midnight shift.  We were here to work the airspace during the closure.  Our airspace is delegated 10;000 feet and below.I received two flight plans for the two aircraft en-route from ZZZ1 Approach. The assigned altitudes were both 10;000 feet.  When the targets appeared on my scope; they were at 12;000 feet.  I called ZZZ2 Approach and coordinated 12;000 feet so the aircraft would not have to descend back down.  They approved the coordination.  I then called ZZZ1 and told them to leave the Aircraft at 12;000 feet; but in the system at 10;000 feet so the flight plan would stay in my airspace.The communication was not entirely clear that the airspace was closed prior to working the abnormal midnight shift.
TRACON Controller reported an airspace violation occurred after rearranging altitudes in the ATC system to accommodate arriving aircraft in his sector due to another ATC site closing for COVID-19 sanitation.