Droplet already has a pending event

[erkie]

422 Droplet already has a pending event.

goroutine 1 [running]:
github.com/feederco/really-simple-db-backup/pkg.AlertError(0xc00000c0c0, 0xc0001c21c0, 0x3b, 0x7f9de0, 0xc000246300)
    /Users/erik/feederco/really-simple-db-backup/pkg/alerting.go:22 +0xa0
github.com/feederco/really-simple-db-backup/cmd.createAndMountVolumeForUse(0x79732c, 0xd, 0x125, 0xc0000158f0, 0x0, 0x0, 0x0, 0x0, 0x79442c, 0x4, ...)
    /Users/erik/feederco/really-simple-db-backup/cmd/volume.go:67 +0x899
github.com/feederco/really-simple-db-backup/cmd.backupMysqlPerform(0x79442c, 0x4, 0xc000078660, 0x14, 0xc000010d80, 0xf, 0x0, 0x0, 0x0, 0x0, ...)
    /Users/erik/feederco/really-simple-db-backup/cmd/backup_perform.go:70 +0x558
github.com/feederco/really-simple-db-backup/cmd.Begin(0xc00000a060, 0x2, 0x2)
    /Users/erik/feederco/really-simple-db-backup/cmd/backup.go:83 +0x1b29
main.main()
    /Users/erik/feederco/really-simple-db-backup/main.go:10 +0x45