Help Request - Held Pedal note

Good afternoon,

I am in need of assistance. I am transposing a 120 year piano score (with an f clef - how neat) in common time, and in the bass line there is often a whole note chord with the pedal symbol on the first beat of the measure, however it is excluded from the rest of the bass line.
I cannot for the life of me find out a way to add these chords in without Musescore thinking I've used up all my beats in the measure for the left hand.
I have attached a photograph and I am hoping that someone will be able to help me with this. It would be very much appreciated.

Regards,
Accolade.