Double sound on a bass line in Logic 11.2.2 and Sequoia 15.6.1

I'm using Logic 11.2.2. and Sequoia 15.6.1 and I'm getting an annoying double sound on a bass line on one note. I've looked on line for answers, copied and pasted notes in the offending area with no sucess.

Help.

John

[Re-Titled by Moderator]

Original Title: Double sound annoying.