Inconsistent indent QGIS - qgis

Question

I try to set some qwidgets on fields in a Qgis Project, but i have an error of inconsistent dedent at elif field.name() == 'syst':. Made so far:
def load(self):
map_layers = iface.legendInterface().layers()
for layer in map_layers:
if layer.name() == 'MAT_CANA':
mat_canaId = layer.id()
elif layer.name() == 'Collecteur':
CollecteurId = layer.id()
elif layer.name() == 'FORME_CHAMBRE':
FormeChambreId = layer.id()
elif layer.name() == 'Genre_Chambre':
GenreChambreId = layer.id()
elif layer.name() == 'MAT_CHMB_COU':
MaterialChambreCouId = layer.id()
elif layer.name() == 'PRECISION':
PrecisionId = layer.id()
elif layer.name() == 'SYSTEM_ECOULE':
SystemEcouleId = layer.id()
for layer in map_layers:
if '"public"."chambre_eau_provisoire"' in layer.source():
layer.setEditForm('C:/Users/george.vina/Desktop/BOUDRY/Forme/formeUi/chambrePr.ui')
fields = layer.pendingFields()
for field in fields:
if field.name() == 'genre_cham':
fieldIndex = layer.fieldNameIndex('genre_cham')
layer.setEditorWidgetV2(fieldIndex,'ValueRelation')
layer.setEditorWidgetV2Config(fieldIndex,{'Layer': GenreChambreId,'Key': 'genre_chambre', 'Value': 'genre_chambre'})
elif field.name() == 'syst':
fieldIndex = layer.fieldNameIndex('syst')
layer.setEditorWidgetV2(fieldIndex,'ValueRelation')
layer.setEditorWidgetV2Config(fieldIndex,{'Layer': SystemEcouleId,'Key': 'system_ecoule', 'Value': 'system_ecoule'})
elif field.name() == 'type_chamb':
fieldIndex = layer.fieldNameIndex('type_chamb')
layer.setEditorWidgetV2(fieldIndex,'ValueRelation')
layer.setEditorWidgetV2Config(fieldIndex,{'Layer': FormeChambreId,'Key': 'forme_chambre', 'Value': 'forme_chambre'})
elif field.name() == 'mat_chamb':
fieldIndex = layer.fieldNameIndex('mat_chamb')
layer.setEditorWidgetV2(fieldIndex,'ValueRelation')
layer.setEditorWidgetV2Config(fieldIndex,{'Layer': MaterialChambreCouId,'Key': 'mat_chmb_cou', 'Value': 'mat_chmb_cou'})
elif field.name() == 'type_couve':
fieldIndex = layer.fieldNameIndex('type_couve')
layer.setEditorWidgetV2(fieldIndex,'ValueRelation')
layer.setEditorWidgetV2Config(fieldIndex,{'Layer': MaterialChambreCouId,'Key': 'mat_chmb_cou', 'Value': 'mat_chmb_cou'})