@Ali_Senger, your problem occurred because your backup was made by a version of Manager so old the switch to SQLite structure had not yet occurred. For a long while, conversion was part of the installation script. But that ceased after v20.9.89. So you will need to upgrade in two stages: first to 20.9.89 (downloaded from Github), then to a more current version. See this topic for information and links: Opening old files in new version - #10 by Patch.
Tut
4
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| This business database is not valid | 1 | 101 | August 12, 2025 | |
| This business database is not valid *Internal Error* | 5 | 563 | April 10, 2021 | |
| Business database not valid | 10 | 214 | November 1, 2024 | |
| Manager does not want to import my old database | 1 | 606 | April 1, 2021 | |
| SQLite database error message after update | 1 | 956 | June 12, 2021 |