Regex - Remove repeated lines between patterns

Hi friends.

I need a REGEX that remove repeated lines between 2 lines of a given pattern:

 INPUT:

Pattern.SomeText
RepeatedLine
RepeatedLine
RepeatedLine
Line

Pattern.OtherText
RepeatedLine

Pattern.ThirdText
RepeatedLine
TTTT
RepeatedLine

Output:

Pattern.SomeText
RepeatedLine
Line

Pattern.OtherText
RepeatedLine

Pattern.ThirdText
RepeatedLine
TTTT


Lines with pattern always start with it, and the full line is unique. I want to make it with Notepad++.

Anyone can help me? Thanks in advance!!