SUMMARY
When i synchronise my calendar with nextcloud, the remoteID field can greather than 255, in result of mysqlSQL error and crash .... 

g.kde.pim.akonadiserver: Error during insertion into table "PimItemTable" "Data too long for column 'remoteId' at row 1 QMYSQL3: Unable to execute statement"
g.kde.pim.akonadiserver:   Query: "INSERT INTO PimItemTable (rev, remoteId, remoteRevision, gid, collectionId, mimeTypeId, datetime, atime, dirty, size) VALUES (:0, :1, :2, :3, :4, :5, :6, :7, :8, :9)"
g.kde.pim.akonadiserver:   Values: QMap((":0", QVariant(int, 0))(":1", QVariant(QString, "https://nextcloud.brain-networks.net/remote.php/dav/calendars/Adrien.Faveraux/personal_shared_by_Anselme.Josset/040000008200E00074C5B7101A82E0080000000C070CA1EA9B1D40100000000000000001000000004865F8D8ECEAA47B9D3185D6F97F452.ics#040000008200E00074C5B7101A82E00800000000C070CA1EA9B1D40100000000000000001000000004865F8D8ECEAA47B9D3185D6F97F4522019-03-25T14:00:00+01:00"))(":2", QVaria ....
g.kde.pim.akonadiserver:   Error text: "Data too long for column 'remoteId' at row 1 QMYSQL3: Unable to execute statement"
g.kde.pim.akonadiserver:   DB error:  "Data too long for column 'remoteId' at row 1"
g.kde.pim.akonadiserver:   Error code: "1406"
g.kde.pim.akonadiserver: DATABASE ERROR:


i have to edit the struct of mysql database of akonadi to set the limit more huge.

mysql  --socket=/tmp/akonadi-quartz.LHhNzx/mysql.socket
MariaDB [akonadi]> ALTER TABLE `PimItemTable` CHANGE `remoteId` `remoteId` VARBINARY(512) NULL;

Can you set the limit more user friendly by default ? 

STEPS TO REPRODUCE
1. Have an huge remoteID in ICS filename
2. 
3. 

OBSERVED RESULT
Crash

EXPECTED RESULT
Work :)

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 29 
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version:  5.55
Qt Version:  5.11.3

ADDITIONAL INFORMATION