MacOS Catalina, Disk Utility: "Unable to perform deferred repairs" Upon running Disk Utility against `Macintosh HD - Data&quot;, 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 &quot;error: Unable to perform deferred repairs without full space verification&quot; 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.
Run Disk Utility in Recovery Mode:

Boot into Recovery mode by holding down ⌘R while powering up
Select Disk Utility
Select the &quot;Container&quot; for Macintosh HD - Data (do not select Macintosh HD - Data itself)
Click &quot;First Aid&quot; and &quot;Run&quot;
If that does not seem to fix the problem, select the Drive that contains the &quot;Container&quot; and run &quot;First Aid&quot; on it.

The above is from memory. You may need to mount or unlock the drive at some point in the above process.