MacOS Catalina, Disk Utility: "Unable to perform deferred repairs"

Upon running Disk Utility against `Macintosh HD - Data", I get the following towards the end of the check:

error: dstream (id 8753874978) does not have an associated dstream id object
Verifying allocated space.
Performing deferred repairs.
error: Unable to perform deferred repairs without full space verification
error: Try running fsck against the entire APFS container instead of a volume
The volume /dev/rdisk1s1 could not be verified completely.
File system check exit code is 0.
Restoring the original state found as mounted.

I've booted into Single User mode, but running fsck -fy tells me that it cannot be run because the /dev/rdisk1s1 drive is mounted in write mode. I've also tried Googling the term "error: Unable to perform deferred repairs without full space verification" and found 1 thread on Apple's forums, with 67 likes and 0 answers. So, how can I repair my HD? rMBP late 2013 model.