Dear support i have tried the last days iam strugling and causing you so much trouble

to import my old joomla forum that was based on the discontinued 1.5 joomla and ccboard. from codeclassic.org that does not exist anymore.. i asked in their forums as in the kunena for migration help.. the support was none only some old referring about using kunena import in kunena 1.7. i have managed to import my messages but it seems that kunena uses anohter timestamp that messes up the migration showing posts
Example
In joomla 1.5 ccboard a topic with creation date 21-07-2017 07:27:48 when migrated
in joomla 2.5 kunena 2 ~ 5.0.10 i get the same topic and post with this date! 17 may 2018 08:27 almost one year later!
as i search i found that ccboard Ccboard has a field for time format in configuration page and has this settings inside its field for setting the dates on post and topics %d-%m-%Y %H:%M:%S
kunena import uses
/adminstrator/components/com_kunenaimporter/models/import.php
$message->time += $this->timedelta;
if ($message->modified_time) {
$message->modified_time += $this->timedelta;
so original dates are converted in kunena to timestamp format
the difference of posts
14/05/2018 14:14 with timestamp 1526307254
2017-07-18 12:14 with timestamp 1500380040
as an example Arlex wong informed me that there were post with dates of 2019 and this caused an issue new posts i could not see them because they took wrong dates...
300 days, 2 hours, 0 minutes and 14 seconds. difference -25927214
so after searching i found a way....to update time....UPDATE izlt_kunena_messages SET time = time -25927214
UPDATE izlt_kunena_messages SET time = time+25934400
dates seem ok now i will try to remigrate....sorry about the fuzz i never had a project from 2012 years ago to upgrade to the last version this site my fathers legacy and helped with medical information our 19.000 members ...last month we had 75.000 unique visitors and 200.000 visits the site niche is medical for pregnancy and fertility and in a Country like Greece with 10 million people and only 100.000 births every year this is maybe the best place for such information/ all this GPDR fuzz forces us to upgrade.. i will inform you here if i manage to migrate for 5th time D: thanks again for all your support. Until then regards Zisopoulos Athanasios.