How to reduce database on Heroku?

I need to reduce my database, but I dont know how because I can only archive the questions.

While Im trying to archive or unarchive, following a tip from Kdoh
my database is growing up!

Help me!
Btw I edited my question and couldnt find the trash can. Tks so much.

My friends ! My Metabase is running into Heroku and the tables is above the limits.
The issue I stop to add any questions, but the app doesnt stop to grow!

Every time I check the Heroku panel, the table is increasing the # of lines.
I’m beginner of the type of this solutions.

Anyone could help me pls!