Question Why is my groups.yml for bPermissions not working? [1.14.4]

So I'm trying to add ranks to my server but it's not working. I try and boot up my server and this appears.

[15:08:49] [MainThread/LOAD/WARN]: Caused by: while parsing a block mapping

in 'string', line 3, column 4:

default:

^

expected <block end>, but found '-'

in 'string', line 95, column 4:

- bukkit.command.help

^

This is my code for my first two ranks:

Code:

default: default

groups:

default:

permissions:

- bukkit.command.help

- bukkit.command.plugins

- bukkit.command.version

- essentials.afk

- essentials.afk.auto

- essentials.afk.message

- essentials.back.ondeath

- essentials.balance

- essentials.balance.others

- essentials.balancetop

- essentials.clearinventory

- essentials.clearinventoryconfirmtoggle

- essentials.compass

- essentials.delhome

- essentials.eco.loan

- essentials.essential.kits.starter

- essentials.help

- essentials.helpop

- essentials.home

- essentials.ignore

- essentials.info

- essentials.kit

- essentials.mail

- essentials.mail.send

- essentials.motd

- essentials.msg

- essentials.msgtoggle

- essentials.pay

- essentials.payconfirmtoggle

- essentials.paytoggle

- essentials.protect.damage.contact

- essentials.protect.damage.creeper

- essentials.protect.damage.drowning

- essentials.protect.damage.fall

- essentials.protect.damage.fire

- essentials.protect.damage.fireball

- essentials.protect.damage.lava

- essentials.protect.damage.lightning

- essentials.protect.damage.projectiles

- essentials.protect.damage.suffocation

- essentials.protect.damage.tnt

- essentials.realname

- essentials.rules

- essentials.seen

- essentials.sell

- essentials.sell.bulk

- essentials.sell.hand

- essentials.sethome

- essentials.sethome.bed

- essentials.signs.balance

- essentials.signs.buy

- essentials.signs.disposal

- essentials.signs.free

- essentials.signs.info

- essentials.signs.kit

- essentials.signs.mail

- essentials.signs.protection

- essentials.signs.sell

- essentials.signs.trade

- essentials.signs.warp

- essentials.silentjoin

- essentials.silentquit

- essentials.sleepingignored

- essentials.spawn

- essentials.tpa

- essentials.tpacancel

- essentials.tpaccept

- essentials.tpahere

- essentials.tpdeny

- essentials.tptoggle

- essentials.warp

- essentials.warp.list

- essentials.warps.hub

- essentials.world

- essentials.worlds.creative

- essentials.worlds.survival

- essentials.worlds.world

- essentials.worth

- griefprevention.buysellclaimblocks

- griefprevention.claims

- griefprevention.givepet

- griefprevention.trapped

- minecraft.command.me

groups: []

meta:

prefix: '&7[Member]&r'

priority: '100'


iron:

permissions:

- essentials.chat.color

- essentials.enderchest

- essentials.feed

- essentials.hat

- essentials.list

- essentials.nick

- essentials.ping

- essentials.ptime

- essentials.pweather

- essentials.recipe

- essentials.showkit

- essentials.setworth

- essentials.skull

- essentials.skull.modify

- essentials.suicide

- essentials.teleport.cooldown.bypass.tpa

- essentials.teleport.cooldown.bypass.back

- essentials.teleport.timer.move

- essentials.teleport.timer.bypass

- essentials.workbench

- essentials.signs.color

- essentials.create.sell

- essentials.afk.kickexempt

- essentials.kits.iron

- essentials.nick.color

- essentials.keepinv

groups:

- member

meta:

priority: '200'

prefix: '&f[Iron]&r'

I don't know what's wrong and if I remove the second rank it works perfectly fine. What's wrong, yaml??