Google Sheets (need advice)

Hello all,

Well i just seen that the CREATE table is useless now
So i changed it to the current time and day, while writing new data.
As grafana and other apps what use the SHEET to load data won’t recognize the data/time

But i have 11k values like this
2023-03-22 00:00:02.725757

Is there a way i can change it to this format 2023-03-22 00:00:02 trough a script or something?
Otherwise 11k rows are gonna be useless for me.