Failed to remove signs/channels (SQLite not updated)

[Ru1x]

Bug report

I'm using version:4.0.4
I'm on Minecraft:1.12.2
I'm running:Paper

Seen results:
Removing any signs or /wr remove <Channel ID> does not remove records from SQLite DB therefore signs are re-generated once the server restarts

Expected results:
Destroying Signs immediately removes records from the database.

How to reproduce:

1. Create the first sign (let's do transmitter), and name it wrtest
2. You just created a new channel is shown
3. Verify that Debug message are shown as well

[INFO]: [WirelessRedstone][Debug] Channel created in database. wrtest
[INFO]: [WirelessRedstone][Debug] Placed new WirelessPoint in the database

4. Create another sign (maybe receiver)
5. You just extended a channel is shown
6. Verify that Debug message are shown as well

[INFO]: [WirelessRedstone][Debug] Placed new WirelessPoint in the database

7. Verify database has these records on the table channel, transmitter, and receiver
8. Destroy 2 signs
9. 2x Successfully deleted this sign are shown
10. Any Debug Message is NOT shown
11. Database records still exist on the table channel, transmitter and receiver

Additional info:
Manually remove records from SQLite using external tools can delete channels entirely.