How to set PicturePasteDisabled to false in Office Web Apps Farm

I'm sure this is probably something super trivial. But I have several farms that have PicturePasteDisabled set to true. This was not defined during the creation of the farm. I'm trying to set it to false. Specifying -PicturePasteDisabled:$false doesn't show an error, but doesn't change it, either. I've tried $null as well. Am I missing something?

PS C:\Users\administrator.FABRIKAM> set-officewebappsfarm -PicturePasteDisabled:$false

FarmOU                            : ldap://OU=Lync Servers
InternalURL                       : https://owasfarm01.fabrikam.local/
ExternalURL                       : https://owasfarm01.fabrikam.local/
AllowHTTP                         : False
SSLOffloaded                      : False
CertificateName                   : owas01
EditingEnabled                    : True
LogLocation                       : C:\ProgramData\Microsoft\OfficeWebApps\Data\Logs\ULS
LogRetentionInDays                : 7
LogVerbosity                      :
Proxy                             :
CacheLocation                     : C:\ProgramData\Microsoft\OfficeWebApps\Working\d
MaxMemoryCacheSizeInMB            : 75
DocumentInfoCacheSize             : 5000
CacheSizeInGB                     : 15
ClipartEnabled                    : True
TranslationEnabled                : False
MaxTranslationCharacterCount      : 125000
TranslationServiceAppId           :
TranslationServiceAddress         :
RenderingLocalCacheLocation       : C:\ProgramData\Microsoft\OfficeWebApps\Working\waccache
RecycleActiveProcessCount         : 5
AllowCEIP                         : False
ExcelRequestDurationMax           : 300
ExcelSessionTimeout               : 450
ExcelWorkbookSizeMax              : 10
ExcelPrivateBytesMax              : -1
ExcelConnectionLifetime           : 1800
ExcelExternalDataCacheLifetime    : 300
ExcelAllowExternalData            : True
ExcelWarnOnDataRefresh            : True
OpenFromUrlEnabled                : False
OpenFromUncEnabled                : True
OpenFromUrlThrottlingEnabled      : True
PicturePasteDisabled              : True
RemovePersonalInformationFromLogs : False
AllowHttpSecureStoreConnections   : False
IgnoreDeserializationFilter       : False
Machines                          : {OWAS01}