Problem after updating Zabbix 6.0 to 7.4 when configuring widgets on the dashboard.
The problem is that the "itemid" in the database was converted to the form e.g. "100100000010084" in the old version of Zabbix from 1.8 to 2.2, where distributed monitoring was used, where the node identifier was added. My database was historically updated from version 1.x to the present. The problem with hostid and itemid (probably also with other IDs) appeared only in version ZABBIX 7.x. The database update/conversion after starting the zabbix-server process still went fine when switching between versions.
This problem is identical to "ZBX-27274", but appears in a different place, e.g.: when adding the "item history" widget to the dashboard.