Não acredito que seja uma maneira recomendada de compartilhar o acesso a um repositório SVN. Você está usando o protocolo file:///
para acessar o repositório e geralmente é desencorajado fazê-lo dessa maneira. Veja este StackOverflow Q & A intitulado: repositório svn no compartilhamento de rede do Windows .
Da documentação do TortoiseSVN
file:// access is intended for local, single-user access only, particularly testing and debugging. When you want to share the repository you really need to set up a proper server, and it is not nearly as difficult as you might think. Read the section called “Accessing the Repository” for guidelines on choosing and setting up a server.
Este mesmo sentimento é ecoado no SVN Bean Book também .
Do not be seduced by the simple idea of having all of your users access a repository directly via file:// URLs. Even if the repository is readily available to everyone via a network share, this is a bad idea. It removes any layers of protection between the users and the repository: users can accidentally (or intentionally) corrupt the repository database, it becomes hard to take the repository offline for inspection or upgrade, and it can lead to a mess of file permission problems (see the section called “Supporting Multiple Repository Access Methods”). Note that this is also one of the reasons we warn against accessing repositories via svn+ssh:// URLs—from a security standpoint, it's effectively the same as local users accessing via file://, and it can entail all the same problems if the administrator isn't careful.
Leia o SO Q & A. Há um número de pessoas que atestam os problemas que enfrentaram, fazendo desta forma onde o repositório foi corrompido.
Melhor configurar um daemon svnserve
real e permitir que ele controle o acesso ao repositório. É muito simples configurar isso.