1. In 7.4 this can be reproduced in value maps:
1.1. go to host edit and open value mapping;
1.1. add name "1" and some mapping values;
1.2. add another name "01" and some mapping values;
result=error: "Given valuemap name is already taken."

2. In 8.0 this can be reproduced in value maps and MFA settings:
2.1. for value maps see 1;
2.2. go to MFA settings;
2.3. add name "1";
2.4. add another name "01";
result=error: "Name already exists."

Possibly more places affected.