Database error on first login: Error Number:1525

Hello, upon fresh install of v1.5.11 on a new Ubuntu-server 20.04 and Apache, everything installs fine and sets up the database fine, but upon first login I’m shown a red screen with this message:

A Database Error Occurred

Error Number: 1525

Incorrect DATE value: '0000-00-00'

SELECT SQL_CALC_FOUND_ROWS ip_quotes.*, ip_users.*, ip_clients.*, ip_invoice_sumex.*, ip_invoice_amounts.invoice_amount_id, IFnull(ip_invoice_amounts.invoice_item_subtotal, '0.00') AS invoice_item_subtotal, IFnull(ip_invoice_amounts.invoice_item_tax_total, '0.00') AS invoice_item_tax_total, IFnull(ip_invoice_amounts.invoice_tax_total, '0.00') AS invoice_tax_total, IFnull(ip_invoice_amounts.invoice_total, '0.00') AS invoice_total, IFnull(ip_invoice_amounts.invoice_paid, '0.00') AS invoice_paid, IFnull(ip_invoice_amounts.invoice_balance, '0.00') AS invoice_balance, ip_invoice_amounts.invoice_sign AS invoice_sign, (CASE WHEN ip_invoices.invoice_status_id NOT IN (1, 4) AND DATEDIFF(NOW(), invoice_date_due) > 0 THEN 1 ELSE 0 END) is_overdue, DATEDIFF(NOW(), invoice_date_due) AS days_overdue, (CASE (SELECT COUNT(*) FROM ip_invoices_recurring WHERE ip_invoices_recurring.invoice_id = ip_invoices.invoice_id and ip_invoices_recurring.recur_next_date <> '0000-00-00') WHEN 0 THEN 0 ELSE 1 END) AS invoice_is_recurring, ip_invoices.* FROM `ip_invoices` JOIN `ip_clients` ON `ip_clients`.`client_id` = `ip_invoices`.`client_id` JOIN `ip_users` ON `ip_users`.`user_id` = `ip_invoices`.`user_id` LEFT JOIN `ip_invoice_amounts` ON `ip_invoice_amounts`.`invoice_id` = `ip_invoices`.`invoice_id` LEFT JOIN `ip_invoice_sumex` ON `sumex_invoice` = `ip_invoices`.`invoice_id` LEFT JOIN `ip_quotes` ON `ip_quotes`.`invoice_id` = `ip_invoices`.`invoice_id` ORDER BY `ip_invoices`.`invoice_id` DESC LIMIT 10

Filename: core/MY_Model.php

Line Number: 157

Have I got date/timezone setting problems or something going on? I’m not sure where to look for the problem with this error.

Seems like it is a DataBase related thing.
Please read here ==> https://stackoverflow.com/questions/37292628/1292-incorrect-date-value-0000-00-00

And try to adjust your DB-Config (on the server, not InvoicePlane)

Thank you for the link. That did the trick!
Specifically, this command solved the problem in mysql: SET GLOBAL sql_mode = '';

I didn’t have this problem with Ubuntu Server 18.04, so I’m not sure what changed with 20.04.

It’s all good now though. Thanks again.