I have Odoo 14 with Pycharm on Ubuntu 18.04, I was following the steps in official guide at: https://www.odoo.com/documentation/14.0/howtos/backend.html

when reach at where it require to add partner.py and partner.xml (it inheritting res.partner), after these I restart Odoo Server and its failed to start and showing following log / errors. 

please help to solve the problem.

some lines of log:

2021-01-04 10:03:24,486 7309 INFO odoodev werkzeug: 127.0.0.1 - - [04/Jan/2021 10:03:24] "POST /longpolling/poll HTTP/1.1" 200 - 8 0.009 50.034

2021-01-04 10:03:32,335 7309 INFO odoodev odoo.addons.base.models.ir_cron: Starting job `Post process payment transactions`. 

2021-01-04 10:03:32,345 7309 ERROR odoodev odoo.sql_db: bad query: SELECT "res_partner"."id" as "id", "res_partner"."name" as "name", "res_partner"."display_name" as "display_name", "res_partner"."date" as "date", "res_partner"."title" as "title", "res_partner"."parent_id" as "parent_id", "res_partner"."ref" as "ref", "res_partner"."lang" as "lang", "res_partner"."tz" as "tz", "res_partner"."vat" as "vat", "res_partner"."website" as "website", "res_partner"."comment" as "comment", "res_partner"."credit_limit" as "credit_limit", "res_partner"."active" as "active", "res_partner"."employee" as "employee", "res_partner"."function" as "function", "res_partner"."type" as "type", "res_partner"."street" as "street", "res_partner"."street2" as "street2", "res_partner"."zip" as "zip", "res_partner"."city" as "city", "res_partner"."state_id" as "state_id", "res_partner"."country_id" as "country_id", "res_partner"."partner_latitude" as "partner_latitude", "res_partner"."partner_longitude" as "partner_longitude", "res_partner"."mobile" as "mobile", "res_partner"."is_company" as "is_company", "res_partner"."industry_id" as "industry_id", "res_partner"."company_id" as "company_id", "res_partner"."color" as "color", "res_partner"."partner_share" as "partner_share", "res_partner"."commercial_partner_id" as "commercial_partner_id", "res_partner"."commercial_company_name" as "commercial_company_name", "res_partner"."company_name" as "company_name", "res_partner"."instructor" as "instructor", "res_partner"."message_main_attachment_id" as "message_main_attachment_id", "res_partner"."email_normalized" as "email_normalized", "res_partner"."message_bounce" as "message_bounce", "res_partner"."email" as "email", "res_partner"."phone" as "phone", "res_partner"."user_id" as "user_id", "res_partner"."signup_token" as "signup_token", "res_partner"."signup_type" as "signup_type", "res_partner"."signup_expiration" as "signup_expiration", "res_partner"."phone_sanitized" as "phone_sanitized", "res_partner"."team_id" as "team_id", "res_partner"."partner_gid" as "partner_gid", "res_partner"."additional_info" as "additional_info", "res_partner"."debit_limit" as "debit_limit", "res_partner"."last_time_entries_checked" as "last_time_entries_checked", "res_partner"."invoice_warn" as "invoice_warn", "res_partner"."invoice_warn_msg" as "invoice_warn_msg", "res_partner"."supplier_rank" as "supplier_rank", "res_partner"."customer_rank" as "customer_rank", "res_partner"."picking_warn" as "picking_warn", "res_partner"."picking_warn_msg" as "picking_warn_msg", "res_partner"."sale_warn" as "sale_warn", "res_partner"."sale_warn_msg" as "sale_warn_msg", "res_partner"."create_uid" as "create_uid", "res_partner"."create_date" as "create_date", "res_partner"."write_uid" as "write_uid", "res_partner"."write_date" as "write_date" FROM "res_partner" WHERE "res_partner".id IN (2)

ERROR: column res_partner.instructor does not exist

LINE 1: ..., "res_partner"."company_name" as "company_name", "res_partn...

                                                             ^

2021-01-04 10:03:32,348 7309 ERROR odoodev odoo.addons.base.models.ir_cron: Unexpected exception while processing cron job {'id': 14, 'ir_actions_server_id': 264, 'cron_name': 'Post process payment transactions', 'user_id': 1, 'active': True, 'interval_number': 10, 'interval_type': 'minutes', 'numbercall': -1, 'doall': None, 'nextcall': datetime.datetime(2021, 1, 4, 9, 59, 35), 'lastcall': datetime.datetime(2021, 1, 4, 9, 49, 48), 'priority': 5, 'create_uid': 1, 'create_date': datetime.datetime(2020, 12, 13, 14, 19, 33, 542677), 'write_uid': 1, 'write_date': datetime.datetime(2020, 12, 13, 14, 19, 33, 542677)} 

Traceback (most recent call last):

  File "/home/odoo/odoo-dev/odoo/odoo/api.py", line 790, in get

    return field_cache[record._ids[0]]

KeyError: 1