Spawn is not protected from the purge

[werken23]

Description

Describe the bug

Using "/bsb purge unowned" removes the spawn island.

Steps to reproduce the behavior

Using "/bsb purge unowned" while having a spawn island.

Expected behavior

Screenshots and videos (Optional)

Environment

BentoBox Version (Mandatory)

31.03 05:07:21 [Server] INFO Running PAPER 1.15.2.
31.03 05:07:21 [Server] INFO BentoBox version: 1.12.0
31.03 05:07:21 [Server] INFO Database: JSON
31.03 05:07:21 [Server] INFO Loaded Game Worlds:
31.03 05:07:21 [Server] INFO skyblock_world (SkyBlock): Overworld, Nether, [end_color]End
31.03 05:07:21 [Server] INFO Loaded Addons:
31.03 05:07:21 [Server] INFO AutoIslandFly 1.0.0 (ENABLED)
31.03 05:07:21 [Server] INFO Biomes 1.6.0.1 (ENABLED)
31.03 05:07:21 [Server] INFO BSkyBlock 1.12.0 (ENABLED)
31.03 05:07:21 [Server] INFO Challenges 0.8.0 (ENABLED)
31.03 05:07:21 [Server] INFO Chat 1.0.4 (ENABLED)
31.03 05:07:21 [Server] INFO ControlPanel 1.7.0 (ENABLED)
31.03 05:07:21 [Server] INFO DimensionalTrees 1.6.0 (ENABLED)
31.03 05:07:21 [Server] INFO EpicHooks 1.0.0 (ENABLED)
31.03 05:07:21 [Server] INFO ExtraMobs 1.11.0.2 (ENABLED)
31.03 05:07:21 [Server] INFO IslandFly 1.7.2-SNAPSHOT-b102 (ENABLED)
31.03 05:07:21 [Server] INFO Level 1.9.3 (ENABLED)
31.03 05:07:21 [Server] INFO Likes 1.7.0 (ENABLED)
31.03 05:07:21 [Server] INFO Limits 1.9.4 (ENABLED)
31.03 05:07:21 [Server] INFO MagicCobblestoneGenerator 1.9.0-SNAPSHOT-LOCAL (ENABLED)

Plugins (Optional)

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Additional context (Optional)

[Poslovitch]

Thanks for the report! I've just fixed this bug, and added a few unit tests to prevent any regression.
I feel sorry for your spawn island, though. Definitely sorry! 😕