I've been working to get an old Magento site from 2.1.16 to 2.3.3 for a while, hope someone can help.
This site was migrated from Magento 1 by a previous admin that is gone, so not sure how they have upgraded in the past.
I first tried composer without luck so went with "method 3".
Created a working copy of the site in test subdomain and uploaded the 2.3.3 files overwriting the existing.
Switched test subdomain to PHP 7.2 to be compatible with Magento 2.3.3
Ran php72 bin/magento setup:upgrade and first got some "has been already defined in" errors but got past by deleting the extra /app/code/Magento/ folders that already had /vendor folders.
Eventually the upgrade seemed to start working but then stopped with:
loginid@m03 [~/test]# php72 bin/magento setup:upgrade
Cache cleared successfully
File system cleanup:
/home/loginid/test/generated/code/Composer
/home/loginid/test/generated/code/Dotdigitalgroup
/home/loginid/test/generated/code/MSP
/home/loginid/test/generated/code/Magento
/home/loginid/test/generated/code/Symfony
/home/loginid/test/generated/code/Yotpo
The directory '/home/loginid/test/generated/metadata/' doesn't exist - skipping cleanup
Updating modules:
Schema creation/updates:
SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '3-' for key 'AST_EAV_ATTRIBUTE_GROUP_ATTRIBUTE_SET_ID_ATTRIBUTE_GROUP_CODE', query was: ALTER TABLE `ast_eav_attribute_group` ADD CONSTRAINT `AST_EAV_ATTR_GROUP_ATTR_SET_ID_AST_EAV_ATTR_SET_ATTR_SET_ID` FOREIGN KEY (`attribute_set_id`) REFERENCES `ast_eav_attribute_set` (`attribute_set_id`) ON DELETE CASCADE, ADD CONSTRAINT `AST_EAV_ATTRIBUTE_GROUP_ATTRIBUTE_SET_ID_ATTRIBUTE_GROUP_CODE` UNIQUE KEY (`attribute_set_id`,`attribute_group_code`)
loginid@m03 [~/test]#
Could anyone help? This install seems kind of a mess although the current site works, just can't add any modules because of the old version.
Would it be possible to start from a fresh install of Magento 2.3.3 and import all the products and pages to get rid of all the legacy code and database entries?
