sometimes occur errrors dump/restore PostgreSQL - postgresql

Question

sometimes when i do database dump and restore occur below errors
pg_restore: [archiver (db)] Error during TOC PROCESSING:
pg_restore: [archiver (db)] Error in the item TOC 3569; 2606 4196743 CONSTRAINT uc_xtb_ruleset_key elinex
pg_restore: [archiver (db)] could not execute query: ERROR: creation of the unique index "uc_xtb_ruleset_key" failed
DETAILS: The key (name) = (FEL.DATI_RIEPILOGO) is duplicated.
    The command was: ALTER TABLE ONLY xtb_rulesets
    ADD CONSTRAINT uc_xtb_ruleset_key UNIQUE (name); pg_restore: [archiver (db)] Error in the item TOC 3425; 2606 4196747 CONSTRAINT uq_currency_iso elinex
pg_restore: [archiver (db)] could not execute query: ERROR: creation of the unique index "uq_currency_iso" failed
DETAILS: The key (iso_code) = (SBD) is duplicated.
    The command was: ALTER TABLE ONLY xtb_currencies
    ADD CONSTRAINT uq_currency_iso UNIQUE (iso_code); pg_restore: [archiver (db)] Error in the item TOC 3418; 2606 4196751 CONSTRAINT xtb_countries_pkey elinex
pg_restore: [archiver (db)] could not execute query: ERROR: creation of the unique index "xtb_countries_pkey" failed
DETAILS: The key (uic_code) = (075) is duplicated.
    The command was: ALTER TABLE ONLY xtb_countries
    ADD CONSTRAINT xtb_countries_pkey PRIMARY KEY (uic_code); pg_restore: [archiver (db)] Error in the item TOC 3420; 2606 4196753 CONSTRAINT xtb_cultures_pkey elinex
pg_restore: [archiver (db)] could not execute query: ERROR: creation of the unique index "xtb_cultures_pkey" failed
DETAILS: The key (culture_id) = (IT) is duplicated.
    The command was: ALTER TABLE ONLY xtb_cultures
    ADD CONSTRAINT xtb_cultures_pkey PRIMARY KEY (culture_id); pg_restore: [archiver (db)] Error in the entry TOC 3427; 2606 4196755 CONSTRAINT xtb_currencies_pkey elinex
pg_restore: [archiver (db)] could not execute query: ERROR: creation of the unique index "xtb_currencies_pkey" failed
DETAILS: The key (uic_code) = (206) is duplicated.
    The command was: ALTER TABLE ONLY xtb_currencies
    ADD CONSTRAINT xtb_currencies_pkey PRIMARY KEY (uic_code); pg_restore: [archiver (db)] Error in item TOC 3447; 2606 4196773 CONSTRAINT xtb_email_resources_pkey elinex
[.....]
pg_restore: [archiver (db)] could not execute query: ERROR: there is no unique constraint that matches the keys given for the referenced table "xtb_cultures"
    The command was: ALTER TABLE ONLY xtb_profiles
    ADD CONSTRAINT fk_profile_to_culture FOREIGN KEY (culture_id) REFERENCES xtb_cultures (cult ...
pg_restore: [archiver (db)] Error in the item TOC 3709; 2606 4196955 FK CONSTRAINT fk_users_to_culture elinex
pg_restore: [archiver (db)] could not execute query: ERROR: there is no unique constraint that matches the keys given for the referenced table "xtb_cultures"
    The command was: ALTER TABLE ONLY xtb_users
    ADD CONSTRAINT fk_users_to_culture FOREIGN KEY (culture_id) REFERENCES xtb_cultures (culture_i ...
pg_restore: [archiver (db)] Error in the item TOC 3680; 2606 4197020 FK CONSTRAINT fk_xtb_f_role_2_role elinex
pg_restore: [archiver (db)] could not execute query: ERROR: there is no unique constraint that matches the keys given for the referenced table "xtb_roles"
    The command was: ALTER TABLE ONLY xtb_function_roles
    ADD CONSTRAINT fk_xtb_f_role_2_role FOREIGN KEY (role_id) REFERENCES xtb_roles (role _...
pg_restore: [archiver (db)] Error in the item TOC 3679; 2606 4197030 FK CONSTRAINT fk_xtb_file_ty_2_folder elinex
pg_restore: [archiver (db)] could not execute query: ERROR: there is no unique constraint that matches the keys indicated for the referenced table "xtb_folders"
    The command was: ALTER TABLE ONLY xtb_file_types
    ADD CONSTRAINT fk_xtb_file_ty_2_folder FOREIGN KEY (folder_id) REFERENCES xtb_folders (fo ...
[...]
    WARNING: error ignored during recovery: 24
I do dump from postgreSQL 9.5.6 and i restore dump on PostgreSQL 9.6.11
[xxxxx#xxxx ~]$ pg_dump -V
pg_dump (PostgreSQL) 9.5.6
[xxxx#xxxx ~]# pg_restore -V
pg_restore (PostgreSQL) 9.6.11
below dump command and restore commande executed
DUMP
ssh user#remoteserver "pg_dump --format=c -c --if-exists -O --schema=public --exclude-table-data=xtb_process_runs --exclude-table-data=xtb_app_properties --exclude-table-data=xtb_doc_properties --exclude-table-data=xtb_export_properties --exclude-table-data=xtb_file_storage --exclude-table-data=xtb_import_properties --exclude-table-data=xtb_org_prop_template --exclude-table-data=xtb_org_props --exclude-table-data=xtb_process_properties --exclude-table-data=xtb_rule_functions --exclude-table-data=xtb_rules --exclude-table-data=xtb_templates --exclude-table-data=xtb_trigger_properties --exclude-table-data=xtb_triggers --exclude-table-data=xtb_user_preferences --exclude-table-data=xtb_variables --exclude-table-data=xtb_events -d DATABASE_NAME" > DATABASE_DUMP.dmp
RESTORE
pg_restore --clean --if-exists --no-owner -h localhost -p 5432 -d DATABASE_NAME -U user DATABASE_DUMP.dmp
can yuo help me ?

Answer 1

Most likely the original database is suffering from corruption. To verify that, try to REINDEX one of these indexes on the original database.
To solve the problem, remove duplicate rows in the table and REINDEX.