"The startup disk cannot be partitioned or restored to a single partition" error in Boot Camp Assistant

Hi,

I wanted to resize my Bootcamp partition using Boot Camp assistant, but get the error

"The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.". I am using High Sierra (10.13.2).

I imagine this has to do with the presence of a Windows Recovery partition. This is the output of diskutil list.

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 500.3 GB disk0

1: EFI EFI 314.6 MB disk0s1

2: Apple_APFS Container disk1 181.0 GB disk0s2

3: Microsoft Basic Data BOOTCAMP 318.1 GB disk0s3

4: Windows Recovery 898.6 MB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +181.0 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 133.9 GB disk1s1

2: APFS Volume Preboot 22.3 MB disk1s2

3: APFS Volume Recovery 506.6 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

Do I need to erase the Windows Recovery partition and merge it back into the BOOTCAMP partition? How do I do this?

Thanks!