C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino:37:25: error: redefinition of 'volatile uint8_t packetStatus'

 static volatile uint8_t packetStatus;

                         ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client.ino:37:25: note: 'volatile uint8_t packetStatus' previously declared here

 static volatile uint8_t packetStatus;

                         ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino: In function 'void NRF905_CB_RXCOMPLETE()':

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino:39:6: error: redefinition of 'void NRF905_CB_RXCOMPLETE()'

 void NRF905_CB_RXCOMPLETE(void)

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client.ino:39:6: note: 'void NRF905_CB_RXCOMPLETE()' previously defined here

 void NRF905_CB_RXCOMPLETE(void)

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino: In function 'void NRF905_CB_RXINVALID()':

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino:44:6: error: redefinition of 'void NRF905_CB_RXINVALID()'

 void NRF905_CB_RXINVALID(void)

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client.ino:44:6: note: 'void NRF905_CB_RXINVALID()' previously defined here

 void NRF905_CB_RXINVALID(void)

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino: In function 'void setup()':

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino:49:6: error: redefinition of 'void setup()'

 void setup()

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client.ino:49:6: note: 'void setup()' previously defined here

 void setup()

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino: In function 'void loop()':

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client - Copy.cpp.ino:63:6: error: redefinition of 'void loop()'

 void loop()

      ^

C:\Users\user\Documents\Arduino\libraries\nRF905\arduino\nRF905\examples\ping_client\ping_client.ino:63:6: note: 'void loop()' previously defined here

 void loop()

      ^

exit status 1
Error compiling for board Arduino/Genuino Uno.