Six is Afraid

Title: Six is Afraid

Rating: 1/5

And why, you might ask, is six afraid of seven?  The puzzle contains the answer several times.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must add to the indicated sum.   
• Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.