B787 captain reported receiving an erroneous cpdlc message from ATC regarding assigned flight level.

Attributes
ACN	1686025
Time
Date	201909
Local Time Of Day	0601-1200
Place
Locale Reference	CZQX.ARTCC
State Reference	NF
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 229 Flight Crew Total 13511 Flight Crew Type 311
Events
Anomaly	ATC Issue All Types

Narrative:

We were at FL320 and requested a climb to FL360 via cpdlc with gander oceanic which gander approved and we accepted via cpdlc and we climbed to FL360 and reported maintaining FL360 automatically via cpdlc. During the climb; gander sent us a message via cpdlc to 'check selected flight level. Cleared flight level is different.' when level at FL360 we contacted gander oceanic via HF to query them about their prior message to us and they said they didn't know why; that message was sent to us in error. There was [an aircraft] behind us 2 miles at FL370. We were offset R2 and they were offset R1. No RA . We continued on to ewr uneventfully.

Original NASA ASRS Text

Title: B787 Captain reported receiving an erroneous CPDLC message from ATC regarding assigned flight level.

Narrative: We were at FL320 and requested a climb to FL360 via CPDLC with Gander Oceanic which Gander approved and we accepted via CPDLC and we climbed to FL360 and reported maintaining FL360 automatically via CPDLC. During the climb; Gander sent us a message via CPDLC to 'check selected Flight level. Cleared flight level is different.' When level at FL360 we contacted Gander Oceanic via HF to query them about their prior message to us and they said they didn't know why; that message was sent to us in error. There was [an aircraft] behind us 2 miles at FL370. We were offset R2 and they were offset R1. No RA . We continued on to EWR uneventfully.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.