Static arp is not set if another entry is present.
Reproduce the problem:
```
show ip neighbors interface br3003780
Address Interface Link layer address State
-------------- ----------- -------------------- ---------
194.55.234.49 br3003780 FAILED
```
```
set protocols static arp interface br3003780 address 194.55.234.49 mac 00:15:5d:a6:1a:01
commit
```
```
show ip neighbors interface br3003780
Address Interface Link layer address State
-------------- ----------- -------------------- ---------
194.55.234.4
```