MissingPropertyException while running setupDistributionMerchantProperties.groovy

Steps:
1. Run Script :
groovy setupDistributionMerchantProperties.groovy
2. Enter all the entries and at last save the changes as showed in below example

groovy setupDistributionMerchantProperties.groovy
Setting up command line options ...
Enter the Distribution Service host URI : aq-qa2-front1
Enter Distribution Service host port (default: 8080): 8080
DEBUG - Base path: http://aq-qa2-front1:8080/distribution/rest/
Enter the caller's username (default: readwrite): readwrite
Enter the password for readwrite:
Enter the merchant id: 090299e9-7f61-42a0-beab-e6bb757e302d

Would you like to see/change any current Content properties for this merchant? y

Current Content Properties from db ****************
ce.mobileBidModifier -> 2
bing.addressLine2 -> Suite 600
tp.packageID -> default
bing.addressLine1 -> 11150 W Olympic
bing.countryCode -> US
tp.industryID -> 50
bing.stateOrProvince -> CA
bing.parentClientCustomerID -> 5121009
tp.enableRightColumn -> true
bing.mobileBidModifier -> 100
ce.desktopBidModifier -> 3
tp.enableTravelingIn -> false
ce.tabletBidModifier -> 4
tp.showPixelStep -> true
ce.includeSearchPartners -> true
bing.desktopBidModifier -> 200
bing.city -> Los Angeles
bing.postalCode -> 90064
bing.language -> English
ce.orderID ->
bing.tabletBidModifier -> 300
tp.locale -> en-US
ce.parentClientCustomerID -> 5891657304
tp.enableInstagramStream -> true
ce.defaultBudget -> 9000000

Will this merchant use Google? y

Will this merchant use Bing? n

Will this merchant use Facebook? n

Will this merchant use YahooJapan? n

Current Content Properties ****************
ce.mobileBidModifier -> 2
ce.desktopBidModifier -> 3
ce.tabletBidModifier -> 4
ce.includeSearchPartners -> true

Would you like to change ce.mobileBidModifier ? y
Enter a value for Content Property field "ce.mobileBidModifier" : (2) : 4

Would you like to change ce.desktopBidModifier ? y
Enter a value for Content Property field "ce.desktopBidModifier" : (3) : 5

Would you like to change ce.tabletBidModifier ? y
Enter a value for Content Property field "ce.tabletBidModifier" : (4) : 6

Would you like to change ce.includeSearchPartners ? y
Enter a value for Content Property field "ce.includeSearchPartners" : (true) : false

Updated Content Properties ****************

ce.mobileBidModifier -> 4
ce.desktopBidModifier -> 5
ce.tabletBidModifier -> 6
ce.includeSearchPartners -> false

Would you like to save these Content properties for this merchant? y

NOTE: This is not breaking and functionality, script is working fine and also saving the changes properly for a merchant.

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Exception:
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Caught: groovy.lang.MissingPropertyException: No such property: useFacebook for class: setupDistributionMerchantProperties
groovy.lang.MissingPropertyException: No such property: useFacebook for class: setupDistributionMerchantProperties
at setupDistributionMerchantProperties.run(setupDistributionMerchantProperties.groovy:454)