fix: duplicate votes for same voter #758

Job	Run time
Format	19s
Tests	3m 28s
Docker (chain, chain)	10m 16s
Clippy	2m 9s
Docker (governance, governance)	9m 49s
Validate Swagger	26s
Docker (pos, pos)	9m 54s
Docker (rewards, rewards)	9m 34s
Docker (seeder, seeder)	9m 50s
Docker (webserver, webserver)	11m 11s
Docker (parameters, parameters)	9m 40s
Docker (transactions, transactions)	9m 56s
can_enqueue	1s
can_merge	0s
	1h 26m 33s

Provide feedback