déplace ton entity_id et supprime ton target :
type: 'custom:button-card'
tap_action:
action: call-service
service: input_number.set_value
service_data:
value: 1
entity_id: input_number.pool_step_wizard_filter_washing
icon: 'mdi:play-box'
show_label: true
show_name: false
label: Démarrer le nettoyage du filtre