Installing Heart Canisters update PR #515 causes additional hearts

[Bloo-dev]

Describe the bug
When installing #515 onto a world which previously had Heart Canisters installed, players with existing heart can keep their health boost effect and gain extra hearts.

To Reproduce
Steps to reproduce the behavior:

1. Install a pre Health Boost potion effect -> Attribute modifiers #515 version of Heart Canisters and put some Heart Canisters in your inventory
2. Install update Heart Canisters to post Health Boost potion effect -> Attribute modifiers #515
3. Notice you have more hearts than expected and a leftover health boost effect.

Expected behavior
The health boost effect should be removed.

Fix
Remove the health boost effect from players that had heart canisters once.

Environment

• Minecraft version: 1.16.5

[Bloo-dev]

Won't fix. Milk or death fixes it.