How to stop old events showing up when typing into S Planner

[diesplannerdie]

Hi all.

When I start to type into the 'Title' bar when adding a new event in S Planner it will show a bar below with previous entries I can select instead of typing it all out if it is something I have added before (e.g. If i just input the letters 'Ta' it will show Take reference info... or Take meds... etc.)

This is fine, the problem is there are certain titles I do not want popping up as predictions were I to ask someone else to add a reminder for me.
I have deleted cache and all data for both versions of S Planner that show in application manager. I have deleted all entries from S Planner. I have disabled one S Planner in application manager, the other one has the disable button greyed out. Still the old entries pop up as suggestions. The only other option I can think of is returning the phone to factory settings which I'd rather not do if possible.

I know I can start using a different calendar, but as it cant be removed, S Planner and these old entry pop ups would still be on my phone.

Any help would be appreciated.
Thanks in advance