What does legacy mean? What does this know?

This means that the legacy is designed for the older versions, so if we enter an enum material class in our code, Minecraft changed the older version of the older version of Id. This is why you should use this legacy_item material prefix. You must use these if you are using a version older than 1.13 for the plugin.

All the legacy material here is what we have given:

ID	Name
9	legacy_stationary_water
11	legacy_stationary_lava
62	legacy_burning_face
115	legacy_nether_warts
71	legacy_iron_door_block
74	legacy_glowing_redstone_ore
83	legacy_sugar_cane_block
349	legacy_raw_fish
144	legacy_skull
63	legacy_sign_post
26	legacy_bed_block
75	legacy_redstone_torch_off
76	legacy_redstone_torch_on
92	legacy_cake_block
93	legacy_diode_block_off
94	legacy_diode_block_on
117	legacy_brewing_stand
149	legacy_redstone_comparator_off
150	legacy_redstone_comparator_on
124	legacy_redstone_lamp_on
64	legacy_wooden_door_block
193	legacy_spruce_door
194	legacy_birch_door
195	legacy_jungle_door
196	legacy_acacia_door
197	legacy_dark_oak_door
59	legacy_wheat